Answer:

Step-by-step explanation:
we know that
The circumference of a circle is equal to

we have

substitute

assume 

Round to the nearest whole number

Answer: -4
Explanation: To find the rate of change, notice that the y values in the
table decrease by 4 each time and the x values increase by 1 each time.
Therefore, the rate of change, or the <em>change in y </em><em>/</em><em> change in x </em>is 4/-1 or -4.