Question 1.EX.7: (a) Once again using the data from Exercise 1.5, draw an XY ...
(a) Once again using the data from Exercise 1.5, draw an XY chart with profits on the vertical axis, sales on the horizontal axis. Choose the scale of the axes appropriately.
(b) (If using Excel to produce graphs) Right click on the graph, choose ‘Add trendline’ and choose a linear trend. This gives the ‘line of best fit’ (covered in detail in Chapter 7). What does this appear to show?
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