Question

A line that includes the points (s, -9) and (5, -6) has a slope of -3. What is the value of s?

Answer 1

s=6

Explanation:

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

or, -3 = (-6+9)/(5-s)

or, -3(5-s) = 3

or, -15+3s = 3

or, 3s = 18

so, s = 6