Question

The circumference of a circle is equal to pi times the diameter. which direct variation equation represents this situation?
A) d=PiC
B) C=Pid
C) C=Pi/d
D) d=Pi/C

Answer 1

The circumference of a circle is equal to pi times the diameter. which direct variation equation represents this situation
C=pi *d the second one

Answer 2

Answer:

Option B is correct

$C = \pi d$

Step-by-step explanation:

Direct variation states that:

if $y \propto x$

then the equation is in the form of:

$y=kx$ where, k is the constant of variation.

As per the statement:

The circumference(C) of a circle is equal to pi times the diameter(d).

then:

$C = \pi \times d$

⇒$C = \pi d$

Therefore, the direct variation equation represents this situation is, $C = \pi d$