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teller
 one year ago
Someone check to see if I'm right?
teller
 one year ago
Someone check to see if I'm right?

This Question is Closed

teller
 one year ago
Best ResponseYou've already chosen the best response.1It would be going up by 4

teller
 one year ago
Best ResponseYou've already chosen the best response.1@jim_thompson5910 mind helping me once again ?I know it's going up by 4 so would it be n4?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1going up by 4? how did you get that?

teller
 one year ago
Best ResponseYou've already chosen the best response.18 to 11 is going up by four and then from 11 to 14 it's going up by four and then from 14 to 17 it's going up by four.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1actually the change from 8 to 11 is +3 but we're going from a small negative (8) to a larger negative (11) so when we do this, we subtract 3 each time

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1draw out a number line to check plot 8 and move 3 units to the left to get to 11 moving 3 units to the left means "subtract 3"

teller
 one year ago
Best ResponseYou've already chosen the best response.1so it would be a negative 3 ? so n3? or no dw:1441678898311:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1let's check that

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1if `n3` was the function rule, then it should take n = 1 and it should produce 8 as the output but if n = 1, then n3 = 13 = 4 which is NOT equal to 8 like we want

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1let's first find the slope

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1what's the change in x? the change in y?

teller
 one year ago
Best ResponseYou've already chosen the best response.1well for the input 1 and for the output 3

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1as x increases by 1, y decreases by 3 change in x = 1 change in y = 3 agreed?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1what would be the slope?

teller
 one year ago
Best ResponseYou've already chosen the best response.1um I don't know not good with slopes.. would it be n+1=3?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1hopefully you wrote down the slope formula I posted on your last question

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I would write that in your notes

teller
 one year ago
Best ResponseYou've already chosen the best response.1I don't have it on me mind rewriting it?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1ok write it down in your notes or somewhere where you can remember \[\Large \text{Slope} = \frac{\text{Change in y}}{\text{Change in x}}\]

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you'll also see this slope formula as well (write this in your notes too) \[\Large \text{Slope} = m = \frac{y_2y_1}{x_2x_1}\] m is often used as the slope

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you have it backwards it should be 3 over 1

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1441679829877:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1441679911895:dw

teller
 one year ago
Best ResponseYou've already chosen the best response.1Okay so slope = 3 over 1

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1441679926075:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1so that's why change in x = 1 change in y = 3

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1so you see why the slope is 3?

teller
 one year ago
Best ResponseYou've already chosen the best response.1Yea I guess but is my answer correct or no?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1no it's not correct

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1let's say hypothetically that x increased by 2 (instead of 1). The change in y stays the same. What would be the slope this time?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yes, 3/2 which is equivalent to 1.5

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1anyways, back to this problem the slope is m = 3

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1pick any input,output pair you want. Which do you choose?

teller
 one year ago
Best ResponseYou've already chosen the best response.1idk um the original I guess 1 8

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1sure let's go with that

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1m = 3 is the slope x = 1 and y = 8 is the input/output pair

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1plug those three values into y = mx+b and solve for b

teller
 one year ago
Best ResponseYou've already chosen the best response.1Just to be clear it would be written like this right ? 8=m1+b or no?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1replace m with 3

teller
 one year ago
Best ResponseYou've already chosen the best response.1so how do I write the one it will just look like 31..

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1mx is the same as m*x so m*x = 3*1 = 3

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yes if you solve 8=3+b for b, you get b = 5

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1summary: m = 3 is the slope b = 5 is the y intercept

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1y = mx+b turns into y = 3x5

teller
 one year ago
Best ResponseYou've already chosen the best response.1so n x35? is the final answer or no n=3x5?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1recall from last time, we can replace x with n

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1so the rule 3x5 is the same as 3n5

teller
 one year ago
Best ResponseYou've already chosen the best response.1so 3n5 is the final answer ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yeah, plug in n = 1 and you should get 8 plug in n = 2 and you should get 11 etc etc I recommend you actually plug in all of the n values from n = 1 to n = 4 to check them all

teller
 one year ago
Best ResponseYou've already chosen the best response.1Okay can you help me on another one once I try it out?

teller
 one year ago
Best ResponseYou've already chosen the best response.1So input goes up 1 and output goes up 2 so slope = 2/1 so if i take the first combinations 1 and 10 it would be 10=2*1+b which gives me b=8 so would it be 2n+8?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1very good, you nailed it

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1to check your answer, you can plug in values of n if n = 1 2n+8 = 2*1 + 8 = 2+8 = 10 so that checks out if n = 2 2*n+8 = 2*2+8 = 12 that checks out as well etc etc

teller
 one year ago
Best ResponseYou've already chosen the best response.1Thank you!You've help me a lot more than what that video will ever do.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I'm glad I could be of help. I'm not sure why the teacher had you watch it when she uses an odd method to find the function rule. If anything, she doesn't mention how to find the generalized rule in terms of n (just how to extend out the table and find outputs for specific inputs).

teller
 one year ago
Best ResponseYou've already chosen the best response.1Yea same I did have a question is the out put goes from a negative to a positive what happens? for example 3 ,1,1,3 ?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.13 ,1,1,3 is your list of outputs?

teller
 one year ago
Best ResponseYou've already chosen the best response.1the list of inputs are 1 2 3 4 n

teller
 one year ago
Best ResponseYou've already chosen the best response.1I would say the output is 2 right?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1I think you mean +2 basically you increase the outputs by 2 each time the inputs increase by 1

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1change in y = +2 change in x = +1 slope = ???

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you have it flipped again

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you mixed up m and b

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you found m = 2 and b = 5 so y = mx+b turns into y = 2x5

teller
 one year ago
Best ResponseYou've already chosen the best response.1oh wait no it's 3 not 5 ,5 is the answer.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1do you see how I got y = 2x5 ?

teller
 one year ago
Best ResponseYou've already chosen the best response.1oh wait so it would be 2n5

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yeah you drop the y= part then change x to n

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1if the input is n, then the output is 2n5

teller
 one year ago
Best ResponseYou've already chosen the best response.1Yea I was getting confused

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1but it's all making sense now? or no?

teller
 one year ago
Best ResponseYou've already chosen the best response.1Input 1 output 2 ? slope = 2 over 1 10=2*1+b = 12 2n12?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1going from 10 to 13 is a change of 3

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.113 > 16 change of 3

teller
 one year ago
Best ResponseYou've already chosen the best response.1Alright thank you so much.That's all I have right now.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1glad that it's making sense
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