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ilovenyc
Group Title
Which of the following inequalities matches the graph? (see attached photo)
A y _>_3x  5
B y < 3x  5
C y < 1/3x  5
D The correct inequality is not listed.
 one year ago
 one year ago
ilovenyc Group Title
Which of the following inequalities matches the graph? (see attached photo) A y _>_3x  5 B y < 3x  5 C y < 1/3x  5 D The correct inequality is not listed.
 one year ago
 one year ago

This Question is Closed

srossd Group TitleBest ResponseYou've already chosen the best response.0
Alright, so lets pick up where we left off. Can you find two points on the line?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Yup, that's one, good job.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Can you find another one?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Well, go over to 2 on the x axis, and then go up until you hit the line. What y are you at? That's how you get a point.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Not quite, although the drawing isn't too great. (2,1) is on the line.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Do you see how that works?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Great! So now, do you remember how to find the slope?
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
To find the slope m of the line segment joining the points, use the slope formula
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Right, so try doing that with (2,1) and (4,7)
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Making any progress, or do you need some help?
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
need some help do i add those both together?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Not quite, it's more of a subtraction. Here's the slope formula: \[\frac{y_2y_1}{x_2x_1} \; \; \; x_1 = 2 \; \; \; x_2 = 4 \; \; \; y_1=1 \; \; \; y_2=7 \]
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc So see if you can use that to find the slope. I'll be back in just a little bit.
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
@srossd so i need to subtract that
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Just use that formula I wrote, plug in the numbers. And now I'll be back in a little bit :).
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
is the answer 13?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
No, here's another hint: \[\frac{71}{42}\]
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
And ok, now I'm actually leaving for a little bit.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Just a few minutes, though.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Alright, I'm back now. So did you get the slope from that?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Well, 6 divided by 2.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
So the slope ends up being 3.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc So now you know that the line will be y=3x+b. So plug in x = 0 to that, and you'll be y=b. So look at the graph, and go to the point where x=0. Find what y is.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
dw:1356749491751:dw
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
The drawing is bad again, it's actually 5. But close enough that I'm pretty sure you get it.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
So if your equation was y=3x+b, and b=5, what's your final equation?
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
2 = 3*(4) + b?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
No, no  just plug in the value of b (5) to y=3x+b. The x and y should stay.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc Do you understand, or do you need some help?
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
need some help
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Ok, so you solved for b, so just put it where b was. The equation comes out to be y=3x5.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Do you see how that works, plugging in 5 for b?
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
so B is the answer
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Actually, it's A, since everything above the line is shaded. B would be the opposite shading.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
But still, good job!
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
And again, sorry for elongating this so much  I just wanted to make sure you understand how to do it.
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc So do you feel like you have a good grasp on how to do this type of problem now?
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
@srossd i think so...
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Alright, good. I can make up another one for you to try if you want.
 one year ago

ilovenyc Group TitleBest ResponseYou've already chosen the best response.0
well i have more problems that i need to do on my homework
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Oh, ok. Need help with those?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
Ok, want to post a new problem?
 one year ago

srossd Group TitleBest ResponseYou've already chosen the best response.0
@ilovenyc I'll be on the lookout for a new post.
 one year ago
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