Apps. and Interpretation for IBDP Maths Ebook 1 | Page 318

Your Practice Set – Applications and Interpretation for IBDP Mathematics
Exercise 90
1. The following scatter diagram shows the distributions of the values of x and y .
(a)
(b)
Plot and label the mean point M(40, 50) on the scatter diagram.
Draw a suitable line of best fit on the scatter diagram.
(c) Describe the correlation between x and y .
(d) Using the line of best fit to estimate the value of y when x � 20 .
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