Edexcel Further Pure Maths IGCSE (2017) SAM Paper 1 Q7

Irritating (at least on my electronic copy) 8 mark graphing question.
The method:
-use the 'table' function on your calculator to quickly find values of a function for a list of given inputs
-plot points and connect with a smooth curve that passes through these points in order to graph a non-straight-line function
-manipulate an equation to end up in the form mx + c = some f(x) in order to draw a straight line and solve the equation

This question is mainly relevant to:
Topic 4 : Graphs

This question is somewhat relevant to:
Topic 1 : Logarithmic Functions and Indices