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Glencoe Math: Course 2, Volume 1

GM

Glencoe Math: Course 2, Volume 1 View details

9. Direct Variation

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Exercise 2 Page 85

How does the constant of variation relate to the rate of change?

Constant of Proportionality: k=5 Interpretation: The Spanish club earned $5 for washing a car

Practice makes perfect

To find the constant of variation of an equation, we need to remember that it is the rate of change of a direct variation. The general form of a direct variation equation sets the dependent variable y equal to the rate of change multiplied by the independent variable x.

y= kx ⇔ y=change in y/change in x* x Let's look at the given equation to identify this value. y= 5x The constant of variation is k=5. In this situation, this means that the Spanish club earned $5 for washing a car.

Subchapter links

Guided Practice p.84

Independent Practice p.85-86

H.O.T. Problems p.86

Standardized Test Practice p.86-88

Extra Practice p.87

Common Core Review p.88