The answer you have is good. You don't need to change anything.
I don’t understand the equation but you can use Photomath to solve any equation you need to solve. It’s and app for free.
the circumference is about 18.85
Answer:
<u>Direct Variation is a relation that is of the form y = mx.</u>
and
<u>Partial Variation is a relation that is of the form y=mx+b</u>
Explanation:
This is a simple way to see the difference between them.
<em>Hope This help you!</em>