A line that includes the points ( - 9,d) and ( - 8, - 4) has a slope of - 8. What is the value of d?

Question

Have not learned this yet, having trouble.

Answer 1

the underlying formula that you want to use here is

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

for this scenario that becomes

-8 = (-4 - d) / (-8 - -9)

-8 = (-4 - d) / 1

-8 = -4 - d

-4 = -d

d = 4

Answer 2

You can solve it as in your previous question.