Find the slope of the line that contains (-2,-2) and (-10,-9)

Answer 1

The underlying formula that you want to use here is

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

for the values given in the question that means

m = (-9 - -2) / (-10 - -2)

= -7 / -8

= 7/8

Answer 2

m = (y₂ - y₁) / (x₂ - x₁)

x₁ = -2

y₁ = -2

x₂ = -10

y₂ = -9

Plug in the numbers.