# Varies directly equation

Write the direct variation equation. y = k x Substitute the given x and y values, and solve for k . 30 = k ⋅ 6 k = 5 The equation is y = 5 x . Now substitute x = 100 and find y . y = 5 ⋅ 100 y = 500 You want to know about a certain topic? We have the answer for you!

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## Direct Variation

The direct variation equation is a linear equation in two variables and is given by y = kx where k is the constant proportionality. The direct variation graph in a coordinate plane is a straight line.

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## Solving direct variation equations

A direct variation, also called direct proportion is a relationship between two variables x and y that can be written as y = kx, k ≠ 0. This situation occurs when the ratio of two variables is constant. When y = kx, we say that y varies directly

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## Direct Variation

y = kx where k is the constant of variation. Since k is constant (the same for every point), we can find k when given any point by dividing the y-coordinate by the x-coordinate. For example, if y ## Direct Variation (video lessons, examples and solutions)

In symbols, the direct variation formula is y=kx or k=y/x where k is the constant of variation or proportionality constant. A simple problem situation will show clearly the idea of a direct relationship between quantities. Say, a