PSAT Math Multiple-Choice Practice Question 751
Question: 751
What would most likely be the average of the slopes of the best-fit lines of the data if the researcher collects and plots the 50 randomly selected values 100 times?
Correct Answer: B
Explanation:
(B) A best-fit line is a line on the graph that shows the overall direction the points seem to be going. The best-fit lines of both of these sets would most likely be a horizontal line with a y-intercept of approximately 50. Horizontal lines have a slope of 0, so the average of the slopes of both of these lines would most likely be 0 as well.
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