Question

Complete the table given that x varies directly as y.

| x | 3 | 5 | 7 | 9 |
| y | | 20 | 28 | |

Answer 1

We know k = x/y

3/y1 = 5/20

By cross-multiplying

3(20) = 5y1

60 = 5y1

y1 = 60/5

= 12

We know k = x/y

7/28 = 9/y2

By cross-multiplying

7y2 = 9(28)

= 252

y2 = 252/7

= 36

| x | 3 | 5 | 7 | 9 |
| y | 12 | 20 | 28 | 36 |