Question

by visual inspection, determine the best-fitting regression model for the data plot below.
a. no pattern
b. quadratic
c. exponential
d. linear

Explanation:

The data points first decrease to a minimum and then increase, forming a U-shaped curve. This matches the shape of a quadratic function, which has a parabolic curve that can have a single minimum or maximum point. A linear model would show a straight line, exponential shows consistent growth/decay, and there is a clear pattern present.

Answer:

B. Quadratic