Question

the function a(r) = 3.14r^2 can represent the area of a circle, a, as a function of the radius of the circle, r. which of the following represents the independent variable? a r area of the circle y

Explanation:

In a function like $A(r)=3.14r^{2}$, the independent variable is the input variable. Here, the value of the area $A$ depends on the value of the radius $r$. So $r$ is the independent variable.

Answer:

B. r