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How do you tell if a relationship is a direct variation?

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What is the difference between partial and direct variation?

A direct variation is a relationship in which one variable changes at the same rate as the other. A partial variation has an initial value and a constant rate of change.

What is an example of an inverse relationship?

The inverse relationship is also known as negative correlation in regression analysis; this means that when one variable increases, the other variable decreases, and vice versa. A typical example of this type of relationship is between interest rates and consumer spending. Why do we study inverse functions? Inverse procedures are essential to solving equations because they allow mathematical operations to be reversed (e.g. logarithms, the inverses of exponential functions, are used to solve exponential equations). Whenever a mathematical procedure is introduced, one of the most important questions is how to invert it.

By Lipp

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