Question

The scatter plot below shows 9 data points.

The graph shows (1, 5), (2, 4), (3, 6.5), (4, 6), (5, 5.8), (6, 5.4), (7, 5), (8, 7), and (9, 6.5).

Drawing a line through which two points creates a reasonable line of best fit for the data?

A.
(1, 4) and (9, 7)

B.
(1, 1) and (8, 9)

C.
(1, 5) and (8, 7)

D.
(2, 4) and (7, 5)

Answer 1

C

A line through (1, 5) and (8, 7) has a slight positive slope and passes near most of the points (it goes through two actual data points and lies centrally among the others), so it is a reasonable line of best fit.