anonymous
  • anonymous
help plz
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
Below are two different functions, f(x) and g(x). What can be determined about their y-intercepts? f(x) = x + 4 x g(x) −1 8 1 0 2 −4 The function f(x) has a higher y-intercept. The function g(x) has a higher y-intercept. They both have the same y-intercept. The relationship between y-intercepts cannot be determined.
Nnesha
  • Nnesha
g(x) is same as y so first of all find y-intercept of de table
Nnesha
  • Nnesha
y=mx+b is a slope intercept form where m is slope and b is y-intercept f(x)=x+4 <----what is the y-intercept in this equation ?

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anonymous
  • anonymous
4
Nnesha
  • Nnesha
yes right and what's the y-intercept of table ?
Nnesha
  • Nnesha
the*
anonymous
  • anonymous
there is 0, 8, and -4
anonymous
  • anonymous
brb please i have to go help my mom out
Nnesha
  • Nnesha
nope 0 ,8 and -4 are y values not y-intercept first of all you have to find slope of the table and then y-intercept
Nnesha
  • Nnesha
alright :-)
anonymous
  • anonymous
i meant \[\frac{ 8 }{ 2 } = \frac{ 4 }{ 1 }\\= 4\]
Nnesha
  • Nnesha
formula is \[\huge\rm \frac{ y_2 - y_1 }{ x_2 - x_1 }\]plug in x and y values u forgot something .-.
anonymous
  • anonymous
\[0 - 8 = -8 and 1 - (-1) = 2\] so we got -4 because \[- \frac{ 8 }{ 2 } = -4\]
Nnesha
  • Nnesha
yes right
anonymous
  • anonymous
now what?
Nnesha
  • Nnesha
now y = mx + b replace m by -4 plug in x and y values solve for b
anonymous
  • anonymous
okay so y = -4x +b 8 = -4(-1) + b 8 = 4 + b -4 - 4 4 = b b = 4
Nnesha
  • Nnesha
yes right that's the y-=intercept of the table
anonymous
  • anonymous
so its C because they both have the same y-intercept
Nnesha
  • Nnesha
yep right
anonymous
  • anonymous
can you help me with more because your so good at getting me to understand it and doing it myself :)
anonymous
  • anonymous
ill post them in a new thread so you can get more medals
Nnesha
  • Nnesha
i'll try and u can post here :-)
anonymous
  • anonymous
okay
anonymous
  • anonymous
Alton has been recording the number of apples on his apple tree each week: Week Apples 2 15 3 22 4 29 5 36 The function representing Alton's apples per week is f(w) = 7w + 1. What does the 1 represent? The number of apples at the start The week number when Alton recorded the apples The number of apples Alton had in total The number the apples increased by each week
Nnesha
  • Nnesha
any idea ?
anonymous
  • anonymous
let me read it again
Nnesha
  • Nnesha
alright
anonymous
  • anonymous
the y - intercept right because you said b = y-intercept or it means y intercept
Nnesha
  • Nnesha
yep one is the y-intercept so what would be ur answer ?
anonymous
  • anonymous
the numbers of apples at the start
Nnesha
  • Nnesha
yes right bec when u substitute 0 for w f(0)=7(0) + 1 you will get one so y-intercept is also the starting point
anonymous
  • anonymous
okay thnx i have a coup[le more
Nnesha
  • Nnesha
okay
anonymous
  • anonymous
Im gonna try to solve the next one on my own and you tell me if its right or wrong but this is the question
anonymous
  • anonymous
On the graph of the equation 8x − 3y = 24, what is the value of the y-intercept? −8 8 −3 3
anonymous
  • anonymous
8x - 3y = 24 -8x - 8x -3y = -8x + 24 /-3 /-3 y = -8x -8 so is the y - intercept -8
Nnesha
  • Nnesha
alright that's right y-intercept is -8 but slope is not -8 divide both side by -3\[\frac{ -3y }{ -3} = \frac{ -8x+24 }{ -3 } = \frac{ -8x }{ -3 } +\frac{ 24 }{ -3}\]
Nnesha
  • Nnesha
-8x+24 OVER -3
anonymous
  • anonymous
oh okay so its like this \[\frac{ -8x + 24 }{ -3 }\]
Nnesha
  • Nnesha
yes right -8x is dividing by -3 and 24/-3
anonymous
  • anonymous
okay but is the answer -8?
anonymous
  • anonymous
for the y-intercept?
Nnesha
  • Nnesha
so how would you write equation in slope yintercept form ?
anonymous
  • anonymous
\[y = \frac{ -8 }{ 3 }x - 8\]
Nnesha
  • Nnesha
yes right!
anonymous
  • anonymous
yay
anonymous
  • anonymous
Based on the table of values below, find the slope between points where x = 3 and where x = 7. x y 3 1 4 6 7 9 −4 \[\frac{ 1 }{ 4 }\] 1 2 <--- my choice
Nnesha
  • Nnesha
how did you get -4 and 1/4 ?
Nnesha
  • Nnesha
ohh wait those are the choices alright how did you get 2 ?
anonymous
  • anonymous
-4 , 1/4, 1, 2 are my answer choices
anonymous
  • anonymous
so i did \[\frac{ 9 - 1}{ 7-3 } = \frac{ 8 }{ 4 }\] = 2
Nnesha
  • Nnesha
yes right
anonymous
  • anonymous
okay lol good i thought i did it wrong lol
anonymous
  • anonymous
After 3 months of living at his new house, Tony had 4 birds. Four months later, Tony still had 4 birds. Which of the graphs below models Tony's bird population? graph of line going through 4, 0 and 4, 8 graph of line going through 0, 4 and 7, 4 <- my choice graph of line going through 1, 5 and 4, 8 graph of line going through 4, 0 and 7, 3
anonymous
  • anonymous
let me know if you want the picture of the graphs
Nnesha
  • Nnesha
i have to go make a new post and yes we need graph
anonymous
  • anonymous
okay

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