Question
Six students revise for a test.
The scatter diagram shows the time, in hours, each student spent revising and their mark in the test.
(a) The data for two more students is shown in the table.
Plot these two points on the scatter diagram.
(b) What type of correlation is shown on the scatter diagram?
(c) Draw a line of best fit on the scatter diagram.
(d) Another student spent 5.5 hours revising.
Estimate a mark for this student.
Answer/Explanation
Ans:
(a) Points plotted at (4.5, 33) and (6.5, 35)
(b) Positive
(c) Correct ruled line
(d) 33.5 to 37.5