Find the average rate of change between f(-7) and f(-1) in the function f(x)=x^2+2x -8

- 6

Step-by-step explanation:

The average rate of change of f(x) in the closed interval [ a, b ] is

here [ a, b ] = [ - 7, - 1 ]

f(b) = f(- 1) = (- 1)² + 2(- 1) - 8 = 1 - 2 - 8 = - 9

f(a) = f(- 7) = (- 7)² + 2(- 7) - 8 = 49 - 14 - 8 = 27

Hence

average rate of change = = = - 6

well the 1 and -1 are always after the 0 and the 0 is inthe middle. s thats what i would guess. but i dont know what a slope of 2 is sorry

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