(a)[1]
On the scatter diagram, plot a point to represent Leo’s marks.
(b)[1]
On the scatter diagram, draw a line of best fit.
(c)[1]
Use your line of best fit to estimate Sonia’s mark in week $2$.
Mathematics 0580 · IGCSE · Scatter diagrams
Scatter diagrams — practice question
Each week, a teacher sets her Spanish students a test. The scatter diagram shows some of the marks the students achieved over two weeks. The horizontal axis is labelled "Mark in week 1" and the vertical axis is labelled "Mark in week 2".