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Chapter 1 Section 4
Direct Variation and Proportion
Direct Variation:
The variable y varies directly as x if there is a nonzero constant k such that y = kx. The equation y = kx is called a direct-variation equation and the number k is called the constant of variation.
Examples:
1. Find the constant of variation k, and the direct variation equation if y varies directly as x and y = -24 and x = 4.
Examples:
2. Find the constant of variation k, and the direct variation equation if y varies directly as x and y = 21 and x = 3.
3.
4.
PracticePage 33-3414-24 evens
37-51 all
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