Question

9. Find the value of b so that the slope of the line passing through the points A(5, - 8) and B(- 1, b) is -2

Answer 1

The value of b is 4.

Explanation:

First, find the y-intercept.

y = mx + b

-8 = -2(5) + b

-8 = -10 + b

2 = b

So now our equation is y = -2x + 2. Now plug in the values.

y = -2(-1) + 2

y = 4