June 2016 Predicted Paper Question 13

From a channel Lumen includes in full: Maths Genie, made by a UK maths teacher, covers the GCSE and A-level maths syllabus topic by topic with worked examples and exam questions, a free revision resource used across UK schools.

A 3-minute video from Maths Genie's catalogue; the title names its topic.

Video by Maths Genie, played through YouTube's embedded player.