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daser333 [38]
3 years ago
6

A line passes through the points (8, –1) and (–4, 2). What is the y-intercept of this line?

Mathematics
1 answer:
Darina [25.2K]3 years ago
4 0
Y=mx+b
m=slope
b=y intercept

alrighty, find the slope

slope between (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1)

the slope between (8,-1) and (-4,2) is (2-(-1))/(-4-8)=(2+1)/(-12)=3/-12=-1/4

y=(-1/4)x+b
find b
subsitute a point
(8,-1)
x=8 and y=-1
-1=(-1/4)(8)+b
-1=-2+b
1=b

the  y intercept is y=1 or the point (0,1)
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Here's what I get  

Step-by-step explanation:

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Your graph must look like one of the two graphs on the right in the Figure below.

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<img src="https://tex.z-dn.net/?f=%5Cfrac%7Bx%7D%7Bx%2B1%7D" id="TexFormula1" title="\frac{x}{x+1}" alt="\frac{x}{x+1}" align="a
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