Question

The points (-1,r) and (11, -1) lie on a line with slope -3/4
Find the missing coordinate r.

Answer 1

8

Explanation:

y = (-3/4)x + c

Sub (11,-1) into the equtaion

-1 = (-3/4)(11) + c

c = 29/4

y = (-3/4)x + 29/4

when x = -1,

y = (-3/4)(-1) + 29/4

y = 8

r = 8