Question

which statement is true about the purpose of trend lines in scatterplots? a trend line must pass through the largest data point. a trend line must pass through the smallest data point. a trend line can be used to make predictions in real - world situations. a trend line shows the exact data points collected.

Explanation:

A trend line is a line drawn on a scatter - plot to show the general direction of the data. It does not have to pass through the largest or smallest data point. Also, it does not show the exact data points (the data points themselves show the exact data). However, it can be used to make predictions in real - world situations. For example, if we have a scatter - plot of the number of hours studied and the test scores of students, the trend line can help us predict the test score of a student who studies a certain number of hours (not in the original data set).

Answer:

A trend line can be used to make predictions in real - world situations.