# Is #2x + y = 4# a direct variation equation and if so what is the constant?

It is not a direct variation. See explanation.

An equation is a direct variation only if it can be transformed to

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No, the equation 2x + y = 4 is not a direct variation equation because it is not in the form y = kx, where k is a constant.

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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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