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What is a variation that is the relationship between two variable quantities with a constant ratio?
Direct variation.
What is the relationship between two quantities in which one quantity depends on the other?
In that case, one quantity (the quantity that depends on the other) is said to be a function of the other quantity.
What is a math expression example?
A math expression is a symbol or combination of symbols that represents a quantity or a relationship between quantities.
Is direct variation a function?
A direct variation is a situation in which two quantities -- such as hours and pay, or distance and time -- increase or decrease at the same rate. The ratio between the quantities is constant; that is, as one quantity doubles, the other quantity also doubles. so yes it is. -add on- A direct variation is in the form y=ax where a is an constant.
Who would use a graph or where?
To visually see the relationship between quantities such that one of them can vary independently and the other varies by some amount (or factor) dependent on the independent quantity.
