Question

Which of the following lines would be the best fit for the data points plotted in the scatter plot below?

The scatter plot on graph showing the points (1, 7), (2, 6), (3, 5), (4, 3), (5, 4), (6, 2), (6, 3), (7, 3), (8, 1), and (8, 2).
A.
y
=
−
7
.
2
x
+
0
.
7

B.
y
=
−
0
.
7
x
+
7
.
2

C.
y
=
0
.
7
x
+
7
.
2

D.
y
=
7
.
2
x
+
0
.
7

Answer 1

B. y = −0.7x + 7.2

Reason: A least-squares fit gives slope ≈ −0.72 and intercept ≈ 7.21, so the line y ≈ −0.7x + 7.2 is the best match.