Given are five observations for two variables, and .

	1	2	3	4	5
	3	5	8	10	13

a. Which of the following scatter diagrams accurately represents the data? 1. 2. 3.

b. What does the scatter diagram indicate about the relationship between the two variables?

There appears to be a

linear relationship between and .

c. Try to approximate the relationship between and by drawing a straight line through the data. Which of the following scatter diagrams with a trend line accurately represents the data?

1. 2. 3.

d. Develop the estimated regression equation by computing the values of and using Equation 14.6 and Equation 14.7 (to decimal).

+ e. Use the estimated regression equation to predict the value of when (to decimal).