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8 March, 06:08

Andrew drives his car 145.5 miles in 3 hours. What is the constant of proportionality that related the total of miles, y, to the number of hours, x?

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  1. 8 March, 06:30
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    48.5

    Step-by-step explanation:

    The constant of proportionality in this case is the speed at which Andrew travels.

    We know that the speed is equal to:

    v = d / t

    We know the distance that is 145.5 miles and the time is 3 hours, replacing:

    v = 145.5 / 3

    v = 48.5 mi / h

    which means that the equation would be:

    y = k * x

    where k, that is, the constant of proportionality is the velocity 48.5.

    y = 48.5 * x

    To check if for example x is worth 3, it would be:

    y = 48.5 * 3

    y = 145.5
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