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  5. Direct and Inverse Proportions

8th Class Mathematics Direct and Inverse Proportions Question Bank Direct and Inverse Proportions

  • question_answer
    Observe the given table.
    x 4 6 8 10 12
    y 8 12 16 20 24
    What can be said about x and y?

    A)  x and y are directly proportional.

    B)  x is inversely proportional to y.

    C)  y is inversely proportional to x.

    D)  There is no proportionality between x and y.

    Correct Answer: A

    Solution :

    Clearly, \[\frac{x}{y}=\frac{4}{8}=\frac{6}{12}=\frac{8}{16}=\frac{10}{20}=\frac{12}{24}=\frac{1}{2}\] \[\therefore \] x and y are directly proportional as \[\frac{x}{y}\] is a constant.


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