Answer
2
Work Step by Step
Given the interval [-2,0]
f(0)=$2(0)+4$=4
f(-2)=$2(-2)+4$=0
The average rate of change of f(x) over the interval [-2,0]
$\frac{f(0)−f(-2)}{0−(-2)}=\frac{4-0}{2}=2$
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