True or false about proportions

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   In direct proportion the ratio x by y is constant.

2. Statement is true

   Yes

   Statement

   In inverse proportion the product xy is constant.

3. Statement is true

   No

   Statement

   Speed and time for a fixed distance vary directly.

4. Statement is true

   Yes

   Statement

   Doubling x in inverse proportion halves y.

5. Statement is true

   No

   Statement

   More taps take longer to fill the same tank.

Instructions

Decide whether each statement is true or false.

Explanation