Worldwide CO2 emissions in 1994 were 23.8 billion tonnes.
Worldwide CO2 emissions in 2014 were 35.3 billion tonnes.
Given that the worldwide CO2 emissions were A A\,A billion tonnes n n\,n years after 1990.
Using a linear model, form an equation linking A A\,A with nnn.
In 2020 worldwide CO2 emissions were 34.8 billion tonnes.
Comment on the suitability of your 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.