Give the slope and y intercept for the line that passes through the pairs of points listed below

Question

A. (8,8) and (10,10) 

B. (0,11) and (11,0)

C. (-4,1) and (7,4)

D. (-9,-11) and (2,5)

Answer 1

I'll do A and I bet you can get the rest!

 

Slope is change in y/change in x. Remember to go the same direction.

 

(8-10)/(8-10) = -2/-2 = 1

 

Now, we use y - y₁ = m(x - x₁).

y - 8 = 1(x - 8)

y - 8 = x - 8

y = x

 

Well, our normal y = mx + b gives us the y-intercept of b, our b here is 0. We just don't wrote y = x + 0.

 

The slope is 1 and the y-intercept is 0.

 

You got the rest!