Posted by **Tess** on Wednesday, September 7, 2011 at 8:30pm.

Let f be defined as follows.

F(x)=y=x^2 -7

(a) Find the average rate of change of y with respect to x in the following intervals.

from x = 4 to x = 5

from x = 4 to x = 4.5

from x = 4 to x = 4.1

(b) Find the (instantaneous) rate of change of y at x = 4

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