What’s the rate of change this is a review how do you solve this

Rate of change is the same slope
To find the slope, pick any two point from the line and then locate its coordinates
(0, 1) and (1, -1)
x₁ = 0 y₁=1 x₂ = 1 y₂=-1
substitute the values into the formula below;
[tex]\text{slope =}\frac{y_2-y_1}{x_2-x_1}[/tex][tex]=\frac{-1-1}{1-0}[/tex][tex]=-2[/tex]