Charms421
Charms421 Charms421
  • 26-01-2018
  • Mathematics
contestada

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

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altavistard
altavistard altavistard
  • 29-01-2018
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
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