How to do direct variation

You can start your lesson by providing a definition of direct variation. Explain that direct variation is a relationship between two quantities that can be represented by a function of the following form: y = kx. where k does not equal 0. Add that

How Do You Use the Formula for Direct Variation?

The height of the plant at the end of each week can therefore by found by multiplying its age by 4: Because we can see that the plant's height increases at the same rate as its age, we can

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Direct Variation

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Direct Variation

Direct Variation Formula: y = kx Here k is the constant of proportionality. If x is not equal to zero then the value of the constant of proportionality can be given as k = y/x. Thus, the ratio of these

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Ex: Direct Variation Equation

Find k when x = distance from lighting = 4 and y = time it takes to hear thunder = 20. 20 = k × 4 20/4 = k 5 = k Therefore, y = 5x is the direct variation equation. Having that relationship is a good thing since you could now predict how long
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