Question

(-4, r) and (5,11) lie on a line with a slope 2. what is r?

Answer 1

r= -7

Explanation:

`\boxed{slope = (y1 - y2)/(x1 - x2) }`

Given that the slope is 2,

`(r - 11)/( - 4 - 5) = 2`

`(r - 11)/( - 9) = 2`

Multiply both sides by -9:

r -11= 2(-9)

r -11= -18

Add 11 on both sides:

r= 11 -18

r= -7