Question
Eight students recorded the number of hours (x) they revised and their score (y) in a test. The results are shown as coordinates below.
(2, 35), (3, 41), (4, 50), (5, 52), (6, 60), (7, 66), (8, 72), (9, 80)
[5 marks]
(2, 35), (3, 41), (4, 50), (5, 52), (6, 60), (7, 66), (8, 72), (9, 80)
(a)Describe the type of correlation shown by this data.
(b)A line of best fit is drawn through the points (2, 32) and (8, 74). Find the equation of this line of best fit in the form y = mx + c.
(c)Use your line of best fit to estimate the test score of a student who revised for 5.5 hours.
This question has 3 parts. You don't have to get them all — each part you answer earns its own marks. Write them as (a) … ; (b) … , or just send the one part you worked out.
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