Easy -2.5 This is a trivial 1-mark question testing only the vertical line test definition of a function—pure recall with no calculation or problem-solving required. Students simply identify which graph fails the vertical line test, making it significantly easier than typical A-level questions.
Determine which one of these graphs does not represent \(y\) as a function of \(x\).
Tick (\(\checkmark\)) one box.
[1 mark]
\includegraphics{figure_3}
Determine which one of these graphs does not represent $y$ as a function of $x$.
Tick ($\checkmark$) one box.
[1 mark]
\includegraphics{figure_3}
\hfill \mbox{\textit{AQA Paper 3 2020 Q3 [1]}}