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

Answer 1

Avery Alexander

It is not a direct variation. See explanation.

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

In such equation the parameter #a# is the variation constant.

The given equation is not a direct variation because it has an aditional parameter #4#.

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Answer 2

Savannah Anderson

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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Answer from HIX Tutor

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.