Question

What is the y-coordinate of the y-intercept of the line that passes through the points (-4, -4) and (4, 8)?

Answer 1

y=mx+b
like in your previous question
m=slope
y= y intercept

find the slope
m= y2-y1/x2-x1
m=8-(-4)/4-(-4)=12/8=3/2

then substitute using this formula

(y-y1)=m(x-x1)
using either of the points
y-(-4)=3/2(x-(-4))
y+4 = 3/2(x+4)
y+4=3/2x + 6
y = 3/2x +6-4
y= 3/2x + 2

So the y intercept is (0,2)