Direct and Inverse Variation

Direct variation is a relationship between two variables where one variable is a constant multiple of the other. It can be expressed as y = kx, where k is the constant of variation.

Inverse variation is a relationship between two variables where the product of the two variables is a constant. It can be expressed as y = k/x, where k is the constant of variation.

k = y/x = 15/12 = 1.25.

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The formula for direct variation is y = kx.

The formula for inverse variation is y = k/x.

y = kx; k = 3. So, y = 3(4) = 12.

k represents the constant of variation in inverse variation.

A table represents direct variation if the ratio of y to x is constant for all pairs of values.

10 feet.