# Is y=2x-9 a direct variation and if so, what is the constant?

Formula for direct variation,

Hence, the constant is,

Check: graph{y=(2-9/x)(x) [-32.47, 32.5, -16.23, 16.24]}

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Yes, the equation ( y = 2x - 9 ) represents a direct variation because it is in the form ( y = kx ), where ( k ) is the constant of variation. In this case, the constant of variation is ( k = 2 ).

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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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