Question
Determine the missing value in the table.
- 15
- 3
- 9
Hint:
Constant of proportionality is the constant value of the ratio between two proportional quantities.
The correct answer is: 15
Here, we have to find the missing number.
Clearly, its constant of proportionality.
To check constant of proportionality, we use y = kx
6/25 = __/5 = 21/7 = 27/9 .
Clearly, k = 3 and x = 5
Y = 5 × 3 .
Y = 15.
Hence, the correct option is (b).
When comparing two or more ratios, the constant of proportionality is a fixed number that indicates the rate at which ratios increase or decrease.
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