I picked two points in the graph, (-1, 0) and (1, 1).
Find the rate by solving for the slope (rise / run).
Rise = x₂ - x₁ = 1 - (-1) = 2
Run = y₂ - y₁ = 1 - 0 = 1
Slope = 2 / 1 = 2
The rate is m = 2
