Question

Identify the variation as direct, inverse, joint or combined. r=cs/t

Answer 1

Combined.

Explanation:

Variation are generally of 4 types,

Direct Variation- When one of the variables increases or decreases, the other one increases or decreases.

Inverse Variation- When one of the variables increases, the other one decreases and vice versa.

Joint Variation- Where more than two variables are related directly .

Combined Variation- A combination of direct or joint variation, and indirect variation.

So in this case, r is in combined variation with s and t. r is in direct variation with s and inverse variation with t. And c is the proportionality constant.