an equation of the form y = kx
k is the constant of variation
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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 .
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 .
The constant.
a varies directly as b and a = 12 when b = 4. What is the constant of variation?
find the constant of variation and the slope of the given line from the graph of y=2.5x