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This is about direct variation.

The area a painter can paint varies directly with the amount of time he works. One morninig, he painted 204 ft² between 8 a.m. and 12:15 PM. Write a direct variation equation to describe the area y covered in x hours.

The forumlua for direct variation is y=kx

  • math -

    Your data tells us that if x = 4.25, y = 204
    sub into the equation
    204 = 4.25kk = 204/4.25 = 48

    so y = 48x

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