Determine whether the scatter diagram indicates that a linear relation may exist between the two variables. If the relation is linear, determine whether it indicates a positive or negative association between the variables. Use this information to answer the following. 0 20 40 0 10 20 30 Explanatory Response A scatter diagram has a horizontal axis labeled "Explanatory" from 0 to 40 plus in increments of 10 and a vertical axis labeled "Response" from 0 to 30 in increments of 5. The following 18 approximate points are plotted, listed here from left to right: (5, 4); (5, 1); (10, 5); (12, 8); (15, 10); (15, 7); (18, 10); (21, 12); (21, 15); (25, 14); (25, 17); (30, 16); (30, 19); (35, 19); (42, 22); (42, 24); (50, 26); (50, 30). The points generally rise from left to right at a constant rate. Question content area bottom Part 1 Do the two variables have a linear relationship? A. The data points have a linear relationship because they lie mainly in a straight line. B. The data points have a linear relationship because they do not lie mainly in a straight line. C. The data points do not have a linear relationship because they do not lie mainly in a straight line. D. The data points do not have a linear relationship because they lie mainly in a straight line. Part 2 Do the two variables have a positive or a negative association? A. The two variables have a positive association. B. The two variables have a negative association. C. None of the above