# If y varies directly as x and #y=28# and #x=18#, how do you find y when #x = 9#?

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To find y when x = 9 in a direct variation, use the formula y = kx, where k is the constant of variation. First, find the value of k using the given values: k = y/x. Then, substitute the values of k and x into the formula to find y. The solution is y = 14.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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