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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