Calculate speed from a graph

Link to question: https://diagnosticquestions.com/Questions/Go#/110267

Link to the quiz: https://diagnosticquestions.com/Quizzes/Go#/202325

Link to the Ultimate Scheme of Work 2.0 spreadsheet: https://docs.google.com/spreadsheets/d/1odj35AVYCR5WbuG-woemi9gYt4BDC58fT8E7ddec8wk/edit?usp=sharing

Spread of answers on Diagnostic Questions: