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A direct variation between two variables, X and Y, may be expressed in the form
Y = c*X where c is some known, constant.
This is a mapping from the set of values of X to the set of values of Y such that for each value of X there is only one value of Y - which is c*X. Such a relationship is a function.
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Earn +20 ptsQ: How is a direct variation a function?
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Is y9x 1 a direct variation function?
No.
Does the function y equals 8x represent a direct or inverse variation?
Direct
Is the direct variation of two variables always a linear function?
YES...A direct variation is a linear relationship in which y-intercept is always 0.
What does k correspond to in a direct variation function?
k is the constant of variation and is the gradient (slope) of the relevant graph.
Which of the following represents a direct variation function?
Any function of the form Y = cX where X and Y are variables and c is a constant.
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