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1 December, 16:24

Julia finds that she can mail a 10 pound package for $5.10 and a 15 pound package for $8.85. What is the constanrt of proportionality?

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  1. 1 December, 16:27
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    0.75

    Step-by-step explanation:

    Using the equation

    y=mx

    where y is the cost, m is constant and x is variable representing packages

    8.85=15x

    5.1=10x

    Subtracting equation 2 from 1 then

    5x=3.75

    x=3.75/5=0.75

    x=0.75

    The constant of proportionality is 0.75
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