Answer:
0.6
Step-by-step explanation:
The rate of change is the slope m of the straight line
Calculate m using the slope formula
m = (y₂ - y₁ ) / (x₂ - x₁ )
with (x₁, y₁ ) = (0, 20) and (x₂, y₂ ) = (20, 32) ← 2 points on the line
m = [tex]\frac{32-20}{20-0}[/tex] = [tex]\frac{12}{20}[/tex] = 0.6
