Question

A line of slope -3 contains the points A= (2,5) B= (4, k) What is the value of k?

Answer 1

Slope = -3

y2 = k
y1 = 5
x2 = 4
x1 = 2

Slope = y2- y1 / x2- x1
-3 = k-5 / 4-2
-3 = k-5 / 2
k-5 = -3 * 2 = -6
k = -6+ 5
k = -1

Therefore, the value of k is -1 .