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Answer:
-2
Explanation:
1. Find the y-coordinates at each end of the requested interval:
x= -1 ==> y = 4 and x= 1 ==> y = 0
2. Use the slope formula to find the rate of change: (y₂ - y₁)/(x₂ - x₁)
(0 - 4) / (1 - -1) = -4 / 2 = -2
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