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A direct variation is when the value of K in multiple proportions is all divisible by the same number for example:
XY=(1)(10) K=10
XY=(2)(20) K=40
XY=(3)(30) K=90
XY=(4)(40) K=160
In this situation the constant (K) of each proportion is divisible by 10 making the multiple equations a direct variation.
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What does the k represent in the direct variation ykx?
The constant of variation in a direct variation is the constant (unchanged) ratio of two variable quantities. The formula for direct variation is. y=kx (or y=kx ) where k is the constant of variation .
What makes a decreasing linear relationship a direct variation?
if the line runs through the origin it is a direct variation no matter if it is increasing or decreasing
What does k represent in direct variation?
The constant.
What is the difference between direct variation and inverse variation?
Direct variation is the ratio of two variable is constant. Inverse variation is when the product of two variable is constant. For example, direct variation is y = kx and indirect variation would be y = k/x .
What is the constant of variation k of the direct variation y kx through (3 2)?
It is 2/3.
