The circumference of a circle is equal to pi times the diameter.The direct variation equation represents this situation is c=πd
Explanation:
Direct variation states that:
if ,y∝x
then the equation is in the form of:
y=kx
where, k is the constant of variation.
As per the statement:
c=π × d
c=πd
The circumference(C) of a circle is equal to pi times the diameter(d) then
c=π × d
c=πd
Therefore, the direct variation equation represents this situation is,
c=πd