find the average rate of change y= 5x -7; from x = 3 to x = 8

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26-01-2018
Mathematics

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find the average rate of change y= 5x -7; from x = 3 to x = 8

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altavistard altavistard · Answer 1 · 2018-01-29T16:46:46+01:00

Let f(x) = y = 5x - 7. Then f(3) = 5(3) - 7 = 8, and f(8) = 5(8) - 7 = 33

Then the ave. r. of c. of f(x) = 5x - 7 from x = 3 to x = 8 is

33 - 8 25
----------------- = -------- = 5 (answer)
8 - 3 5