First of all, I am new ,so hello.

now to the topic:

is the formula for direct variation y=kx

and could you please post examples?

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- Dec 29th 2008, 03:35 PMRussianDirect Variation
First of all, I am new ,so hello.

now to the topic:

is the formula for direct variation y=kx

and could you please post examples? - Dec 29th 2008, 03:39 PMmasters
This is correct. y varies directly as x.

k is called the constant of proportionality or the constant of variation.

Google: direct variation - Google Search - Dec 29th 2008, 03:49 PMRussian
- Dec 30th 2008, 06:43 AMmasters
Example:

**d = rt**(distance = rate X time)

Let**r**be the constant of variation.

The distance (**d)**varies directly as time (**t**) if**r**remains constant. In other words, when**t**increases,**d**increases. When**t**decreases,**d**decreases.

Follow some of the links I gave you and you'll see other examples.

Also, investigate inverse and joint variation as well.

- Jan 1st 2009, 04:26 PMRussian