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Math Help - directly proportional problem

  1. #1
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    directly proportional problem

    The number N of aluminum cans is directly proportional to the number of people P using them.
    It is known that 250 people use 60,000 cans a year.
    What is an equation of variation expessing N as a function of P?

    I know x and y (in this case 250 and 60,000) are directly proportional if y=kx..or something like that i honestly am confused about this one, help please.
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    Quote Originally Posted by lucky13 View Post
    The number N of aluminum cans is directly proportional to the number of people P using them.
    It is known that 250 people use 60,000 cans a year.
    What is an equation of variation expessing N as a function of P?

    I know x and y (in this case 250 and 60,000) are directly proportional if y=kx..or something like that i honestly am confused about this one, help please.
    The number N of aluminum cans is directly proportional to the number of people P using them.

    N = kP

    250 people use 60,000 cans a year.

    60000 = k(250)

    k = 240

    N = 240P
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