Question

If a scatter plot shows a linear association, which must be true of the data?

A.
There is a line that passes through all of the plotted data points.
B.
There is a line that passes through most of the plotted data points.
C.
There is a line that describes the relationship between the two measured quantities reasonably well.
D.
There is a tendency for relatively high values for one measured quantity to be paired with relatively high values for the other measured quantity.

Answer 1

A scatter plot shows a linear association.

Explanation:

Answer 2

If a scatter plot shows a linear association, then there is a line that describes the relationship between the two measured quantities reasonably well. This means that there is a clear pattern in the data, and that the data points tend to follow a straight line when plotted on a graph. This does not necessarily mean that there is a line that passes through all of the plotted data points or that there is a tendency for relatively high values for one measured quantity to be paired with relatively high values for the other measured quantity.

Explanation: