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Objective- To use and write equations involving direct variation

Objective- To use and write equations involving direct variation. When a dependent variable y is proportional to and varies directly with an independent variable x. Direct Variation-. y = k x. k = constant of variation (any non-zero real number).

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Objective- To use and write equations involving direct variation

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  1. Objective- To use and write equations involving direct variation When a dependent variable y is proportional to and varies directly with an independent variable x. Direct Variation- y = k x k = constant of variation (any non-zero real number) Circle the examples of direct variation.

  2. The variable y varies directly with x. When x = 3, y = 21. Find the value of y when x = 8. y = k x y = 7 x 3 3

  3. It takes 5 cups of flour to bake 65 cookies. How many cookies can be made with 7 cups of flour? Let x = cups of flour Let y =# of cookies y = k x y = 13 x 5 5

  4. Graph a Direct Variation y x y -3 -2 -1 0 1 2 3 4 -1.5 -1 -0.5 0 x 0.5 1 1.5 2

  5. Use Data to Write a Direct Variation (x) Pinky 5.4 6.8 7.5 8.1 cm Forefinger (y) 6.5 8 9 9.8 cm Write a direct variation equation that relates the length of a person’s forefinger to their pinky. Let y = forefinger length Let x = pinky length x x

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