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26 October, 05:33

The cost for renting a weed trimmer varies directly with the number of hours used. A weed trimmer rented for 5 hours costs $32.50. Which choice shows the direct variation equation and the amount of rent for 8 hours in this situation?

A y = $6.5x, y = $52.00

B y = $32.5x, y = $260.00

C y = $5x, y = $40.00

D y = $8x, y = $64.00

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  1. 26 October, 05:52
    0
    Let the cost for renting be y and the number of hours be x

    then:

    y=kx

    where:

    k is the constant of proportionality

    k=y/x

    y=$32.5 when x=5 hours

    thus;

    k=32.5/5

    k=6.5

    hence the equation is:

    y=6.5x

    thus the value of y when x=8 hours will be:

    y=6.5 (8) = $52

    Answer:'

    A y = $6.5x, y = $52.00
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