Question

Find y if the line through (8, y) and (9, 1) has a slope of 3.

Answer 1

Answer:

4

Step-by-step explanation:

8 is one away from 9. 4 is three away from 1. 3/1=3. Therefore y=4

Answer 2

Answer:

Step-by-step explanation:

Slope m = (y2 - y1)/(x2 - x1)

m = 3, y2 = 1 , y1 = y, x2 =9, x1 = 8

: 3 = (1 - y)/(9 - 8)

3 = (1 - y)/1

3 = 1 - y

Collecting like terms

y =>1 - 3

y = -2