Question

Complete the equation of the line through (3,-1) and (4,7)

Answer 1

y=8x-25

Explanation:

1) You find the slope by doing y2-y1/x2-x1 (so 7-(-1)/4-3) then you get the slope of 8

2) then you plug in some points using the slope (I'll use the point (3,-1)) : -1=8(3)+b

3) to find "b", you solve: -1=24+b --> b=-1-24 --> b=-25

4) then you put everything together and you get y=8x-25

Answer 2

y=8x-25

Explanation:

I put my work in the picture I attached