As the rate of change of function is negative from x=1 to x=2, the function decreases at this interval.
Step-by-step explanation:
We have to find the rate of change of the function
The rate of change of function is given by:

Given function is:

Here
a =1
b = 2
So,

Putting the values in the formula

As the rate of change of function is negative from x=1 to x=2, the function decreases at this interval.
Keywords: Functions, rate of change
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