In 5 hours, a machine makes 45 screws. In 12 hours, the same machine will make:

1. 36 screws

2. 90 screws

3. 72 screws

4. 108 screws

If the cost of 9 pens is ₹ 369, the cost of one dozen pens of the same make will be:

1. ₹ 42

2. ₹ 429

3. ₹ 942

4. ₹ 492

A man working 48 hours per week earns ₹ 2,400. If he works for 36 hours per week, he will earn:

1. ₹ 3,200

2. ₹ 900

3. ₹ 1,800

4. ₹ 1,080

In the following table, do x and y vary directly: