1. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. To understand how to approach a question about conversion graphs. Objectives

2. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. 1. The currency of the planet Alexus is the Smarg. The people of planet Bobbydog use the Proob as their currency. Use the conversion graph below to find (i) how many Smargs you could buy with 4 Proobs (ii) how many Proobs you could buy with 30 Smargs. 0 Proobs 1 2 3 4 5 6 0 20406080 100120 Smargs (i) Find 4 Proobs and draw a line like this........then another like this. 4 Proobs would be worth 60 Smargs.

3. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. 1. The currency of the planet Alexus is the Smarg. The people of planet Bobbydog use the Proob as their currency. Use the conversion graph below to find (i) how many Smargs you could buy with 4 Proobs (ii) how many Proobs you could buy with 30 Smargs. 0 Proobs 1 2 3 4 5 6 0 20406080 100120 Smargs (ii) Find 30 Smargs and draw a line like this........then another like this. 30 Smargs would be worth 2 Proobs.

4. Edexcel GCSE Maths Spec B – Modular: Booster C © Pearson Education 2010. This document may have been altered from the original. Remember to draw all of your working lines clearly, using a different colour if you need to make it clear. Summary Always check that your answer seems sensible!