1. Direct variation A. Write an equation for the following statements. B. Write an equation when y varies directly as x.

Question

1. Direct variation

A. Write an equation for the following statements.
B. Write an equation when y varies directly as x.
1. y=63 when x=9
2. y=121 when x=11
3. y=36 when x=4
4. y=224 when x=8

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Answers ( No )

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    2021-11-23T19:02:26+00:00

    (1) y = 7x , (2) y = 11x , (3) y = 9x , (4) y = 28x

    given y varies directly as x then y = kx ( k is the constant of variation )

    (1) find k using the given conditions k = \frac{y}{x} = \frac{63}{9} = 7

    equation is y = 7x

    (2) k = \frac{121}{11} = 11

    equation is y = 11x

    (3) k = \frac{36}{4} = 9

    equation is y = 9x

    (4) k = \frac{224}{8} = 28

    equation is y = 28x

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