Answer :
Final answer:
To answer this question, first plot the data points on a scatter diagram. Then, determine the least-squares regression line equation using the given information. Finally, graph the regression line on the scatter diagram.
Explanation:
(a) To draw a scatter diagram, plot the given data points on a graph, with x-values on the horizontal axis and y-values on the vertical axis. Then, connect the points with a line or curve.
(b) The least-squares regression line equation is y^ = -0.9219x + 8.3289. This equation represents the line that best fits the data points.
(c) To graph the least-squares regression line, plot this equation on the same scatter diagram from part (a) by showing a straight line intercepting the y-axis at 8.3289 and having a slope of -0.9219.
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