Direct proportion (Part 2)

Maths

Direct and indirect proportion

A chain costs 8p per 2cm. The cost and length are directly proportional. What is the cost of 6 cm?

The number of text messages sent and the cost are directly proportional. It costs 60  pence to send 10 text messages. What is the cost of sending 20 text messages?

The number of text messages sent and the cost are directly proportional. It costs 60 pence to send 10 text messages. What is the cost of sending 5 text messages?

If 4 ice creams cost £4.80, what is the cost of 12 ice creams?

The cost and the number of mugs are directly proportional.

The cost and the number of mugs are not directly proportional.

Look at the table below. Choose the correct statement that describes the relationship between the number of mugs and the cost of the mugs.

The number of hours worked and the pay are directly proportional.

The number of hours worked and the pay are not directly proportional.

Look at the table below. Choose the correct statement that describes the relationship between the number of hours worked and the pay.

Alex goes to a fair. He wants to go on 6 rides. Each ride costs £2. How much will he pay?

The cost of four pencils is £1.60 What is the cost of one pencil.

The cost of four pencils is £1.60. What is the cost of 12 pencils?

It costs 60 p to send  text messages. Alex has been charged £3 for text messages by Vodafone. How many text messages did he send?

True or False?  A graph of direct proportion always starts at the origin.

Starter Quiz