3. The scatter diagram shows the speaking test scores and the writing test scores for 15 students. Writing test score 20- 15- c) Draw a line of best fit on the scatter diagram. 10- 5- 0- 0 b) What type of correlation is shown on the scatter diagram? X X -X. -X X a) One student's writing test score was much better than their speaking test score. Draw a ring around this point on the scatter diagram. X Speaking test score XX 15 -X. d) One student's scores were not recorded on the scatter diagram. His writing test score was 10. Use your line of best fit to estimate his speaking test score. X X x. 20

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