c. Is the slope of the regression line positive, negative, or zero? Explain. 3. Use the scatterplot shown in Figure 3 to answer this question. a. Is the relationship between x and y positive, negative, zero, or curvi- 2 Figure 3: Figure for Question 3 Scatterplot 00 o 080000 8 8 0 linear? Explain. b. What does the Pearson correlation coefficient (r) equal? Explain. c. Is the slope of the regression line positive, negative, or zero? Explain. d. Are participants who scored high on x and high on y shown in the top left, top right, bottom left, or bottom right of the scatterplot? e. Are participants who scored high on x and low on y shown in the top left, top right, bottom left, or bottom right of the scatterplot? f. Are participants who scored low on x and low on y shown in the top left, top right, bottom left, or bottom right of the scatterplot? g. Are participants who scored low on x and high on y shown in the top left, top right, bottom left, or bottom right of the scatterplot? 4. Consider the following Pearson correlation coefficients: r = 0.5, r = 0.3, r = -0.4, and r = -0.9. Which of these r values represents the strongest 1. Use the scatterplot shown in Figure 1 to answer this question. a. Is the relationship between x and y positive, negative, zero, or curvi- linear? Explain. b. What does the Pearson correlation coefficient (r) equal? Explain. c. Is the slope of the regression line positive, negative, or zero? Explain. 2. Use the scatterplot shown in Figure 2 to answer this question. a. Is the relationship between x and y positive, negative, zero, or curvi- linear? Explain. b. What does the Pearson correlation coefficient (r) equal? Explain. 1 Figure 1: Figure for Question 1 Scatterplot 2 0000000 Figure 2: Figure for Question 2 Scatterplot 15 10 00 10 20 -1.5 -1.0 -0.5 0.0 0.5 1.0 1.5 x