# Thread: Three Forms of Variation

1. ## Three Forms of Variation

There are 3 forms of variation:

1. Direct Variation

2. Inverse Variation

3. Joint Variation

Can someone explain, in easy terms, the basic difference between the three forms of variation? Can someone provide an example for each?

2. ## Re: Three Forms of Variation

Originally Posted by harpazo
There are 3 forms of variation:

1. Direct Variation

2. Inverse Variation

3. Joint Variation

Can someone explain, in easy terms, the basic difference between the three forms of variation? Can someone provide an example for each?

1. y = kx. y varies directly with x.

2. y = k/x. y varies inversely with x.

3. z = kxy. z varies jointly with x and y.
We might also have z = kx/y, z = ky/x, z = k/(xy). But the one I listed is jointly varying.

-Dan

3. ## Re: Three Forms of Variation

Originally Posted by topsquark