Question

The scatter plot shows the number of text messages sent (x) and text messages received (y) by10 students in a half hour.



A scatter plot.Short description, A scatter plot.,Long description,
There are ten points on the scatter plot in a generally upward trend. They have the coordinates listed.

(0, 2).
(5, 1).
(6, 4).
(8, 12).
(11, 11).
(12, 13).
(15, 11).
(17, 20).
(21, 22).
(24, 23).

Question
Which equation could be used to find the ,begin emphasis,best,end emphasis, estimate for the number of text messages received based on the number of text messages sent?

Answer options with 4 options
A.
y equals x

C.
y equals x plus 2

B.
y equals 2 x

D.
y equals 2 x plus 1

Answer 1

A. y = x

Reason: The points trend roughly along the line y = x. A least-squares fit gives slope ≈ 1 and intercept ≈ 0, so y = x is the best estimate.