Is #y/(xz) = -4# a direct variation, inverse variation, joint or neither?
1 Answer
Aug 4, 2015
This is an example of joint variation.
Explanation:
"Joint variation" means "direct variation, but with two or more variables".
All the variables are directly proportional, taken one at a time.
Your equation is
We can rearrange this to
In words, we would say,
#y# varies directly as#x# and#z# , and the constant of variation is#-4# .
