A linear model linking A A\,A with n n\,n is
A=0.575n+22.4 A = 0.575n + 22.4 A=0.575n+22.4where A A\,A is the worldwide CO2 emissions, in billion tonnes, n n\,n years after 1990.
In 2016 worldwide CO2 emissions were 36.2 billion tonnes.
Comment on the suitability of this model in light of this information
260 exam-style questions on Edexcel A Level Maths Straight Line Graphs, covering 5.1 y = mx + c, 5.2 Equations of Straight Lines, 5.3 Parallel and Perpendicular Lines, 5.4 Length and Area, and 5.5 Modelling with Straight Lines. Each one has a worked solution and a mark scheme showing where the marks go.