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SAI International School

                                                     Class VIII


          Mathematics

          Chapter 13- Direct & Inverse Proportion
          Worksheets
          Subtopic : Direct Proportion Introduction & Application



          1) If ‘x’ and ‘y’ are in a direct proportion then which of the following is correct?
          (a) x – y = constant
          (b) x + y = constant
          (c) x × y = constant


          (d)

          2) Which of the following is not a case of direct variation?
          (a) Number of sheets of some kind are increased when their total weight is increased.
          (b) More quantity of petrol is required to travel more distance with a fixed speed.
          (c) More fees would be collected if number of students increased in a class.
          (d) Time taken will be less if number of workers are increased to complete the same work.

          3) Which of the following is an example of direct variation :
          (a) If the length of radius is increased the circumference will be increased.
          (b) If number of students in a hostel is increased then the fixed food provision will last      for
          less days.
          (c) For fixed duration, more the periods, lesser will be the duration of one period.
          (d) In case of a cylindrical vessel, lesser the diameter more is the level of water in it.

          4) If x = 20 and y = 40, then x and y are:

          (a) Directly proportional
          (b) Inversely proportional

          (c) Neither directly nor inversely proportional

          (d)Cannot be determined



          5) If x and y are directly proportional, then which of the following is correct?
          (a) x+y=constant

          (b) x-y=constant

          (c) xy=constant
          (d) x/y=constant
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