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3 August, 09:56

Suppose y varies directly with x and y = 72 when x = 6. What direct variation equation relates x and y? What is the value of y when x = 10?

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  1. 3 August, 10:00
    0
    I guess the slope is y/x=72/6=12. SO when x=10 y=12 (10) = 120.
  2. 3 August, 10:09
    0
    Y=kx is direct varaitoin

    72=6k

    divide both sides by 6

    12=k

    y=12x is the equation

    when x=10

    y=12 (10)

    y=120

    equation is y=12x

    when x=10, y=120
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