# calculus

posted by
**Tess**
.

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.