Answer: [tex]\bold{(A)\ -\dfrac{1}{2}}[/tex]
Step-by-step explanation:
The average rate of change is the slope at the given interval. Use the slope formula: [tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex] with points (0, 2) and (4, 0).
[tex]m=\dfrac{0-2}{4-0}\\\\.\quad =\dfrac{-2}{4}\\\\.\quad = -\dfrac{1}{2}[/tex]
