# 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?
Google them.

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 Google them.

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
I am in Section 2.5 in the textbook. I will post variation problems only if I get stuck.