The points (-11, r) and (-7,5) lie on a line with slope 3
4
Find the missing coordinate r.

r = 2

Step-by-step explanation:

Calculate slope m using the slope formula and equate to

m =

with (x₁, y₁ ) = (- 11, r) and (x₂, y₂ ) = (- 7, 5)

m = = = ( multiply both sides by 4 to clear the fractions )

5 - r = 3 ( subtract 5 from both sides )

- r = - 2 ( multiply both sides by - 1 )

r = 2