# How to tell if x and y show direct variation

c) This relationship is known as inverse proportionality. d) 6 = xy. e) By clearing y, we obtain y = 6 x.  ## Variation is directly proportional to the mean

xy = k ,. or, equivalently,. for some constant k . This means that as x increases, y decreases and as x decreases,

## Unit 6. Direct and Inverse Proportionality

Thus, the equation describing this inverse variation is xy = 10 or y =. Example 2: If y varies inversely as x, and the constant of

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## 🥇 Direct variation (also known as direct proportion)

If y varies inversely as x and y=3, when x=10, find the The word 'inverse' in inverse variation refers to the inverse

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## Quantitative Reasoning.

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## Direct Variation

The direct proportionality equation relating circumference and diameter is shown below. Note that k is replaced by the value

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