Question

Part A Question (#1)

Answer 1

The slope of the secant line is the same thing as the average rate of change.

The average rate of change from an interval from $x_1$ to $x_2$ is the change in the value of the function divided by the change in x.

$\dfrac{f(x_2)-f(x_1)}{x_2-x_1}$

Let's find the values of $f(x_1)$ and $f(x_2)$

$f(x_1)=570$
$f(x_2)=1198.8$

$\dfrac{f(x_2)-f(x_1)}{x_2-x_1}$

$= \dfrac{1198.8-570}{4-0}=157.2 \approx 157$

Your answer rounded to the nearest whole number is 157.