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Given the function f(x) = 72 - 6x + 6, determine the average rate of change of
the function over the interval 2 < x < 8.

Sagot :

Answer:

The average rate of change is 64

Step-by-step explanation:

Given

[tex]f(x) = 7x^2 - 6x + 6[/tex]

Required'

Average rate over 2 < x < 8

The average rate of change is calculated as:

[tex]Rate = \frac{f(b) - f(a)}{b - a}[/tex]

Where a < x < b

So, we have:

[tex]Rate = \frac{f(8) - f(2)}{8-2}[/tex]

[tex]Rate = \frac{f(8) - f(2)}{6}[/tex]

Calculate f(8) and f(2)

[tex]f(x) = 7x^2 - 6x + 6[/tex]

[tex]f(8) = 7 * 8^2-6 * 8 +6 = 406[/tex]

[tex]f(2) = 7 * 2^2-6 * 2 +6 = 22[/tex]

So:

[tex]Rate = \frac{f(8) - f(2)}{6}[/tex]

[tex]Rate = \frac{406 - 22}{6}[/tex]

[tex]Rate = \frac{384}{6}[/tex]

[tex]Rate = 64[/tex]