IXL - Write joint and combined variation equations I (Algebra 2 practice)

Which equation describes this relationship? Remember to include

the constant of variation.

varies directly with

and inversely with

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Which equation describes this relationship? Remember to include

the constant of variation.

varies directly with

and inversely with

and

Joint variation occurs when a variable varies directly with the product of 2 or more variables. Example:

Combined variation occurs when a variable varies directly and/or inversely with 2 or more variables. Example:

"Jointly" indicates there are 2 or more variables in the numerator while "directly" indicates there is 1 variable in the numerator.

Notice that

the constant of variation, always appears in the equation. But since it's a constant and not a variable, it's never mentioned in the description.

Look at the description.

varies directly with

and inversely with

and

Now write the equation. Remember that "directly" refers to 1 variable in the numerator

(

)

and "inversely" refers to any variables in the denominator

(

and

Don't forget

the constant of variation.

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