Question

If we know d, the diameter of a circle, we can find its circumference, C, using the rule πd.
What are the independent and dependent variables in this situation?
d
Input Output Arrow
πd
Input Output Arrow
C
The independent variable is
d
.
The dependent variable is
C
.
Nice!
What equation represents this function? Write an equation in terms of π that shows how we can use the independent variable, d, to find the dependent variable, C.
d
Input Output Arrow
πd
Input Output Arrow
C

Answer 1

The equation that represents this function, showing how we can use the independent variable \( d \) to find the dependent variable \( C \), is:

\[
C = \pi d
\]

This equation indicates that the circumference \( C \) of a circle is equal to the diameter \( d \) multiplied by π (pi).