A quadratic relationship differs from a linear relationship in that…
A) the line for a linear relationship changes direction once, but for quadratic relationships the line changes direction twice.
B) The two types of relationships have lines that change directions different amounts of times. But both should be analyzed by a Pearson correlation.
C) The line for a linear relationship never changes direction, but for quadratic relationships the line changes direction once.
D) None of the above.

Question

Quizplus · Accepted Answer

A linear relationship is represented by a straight line, which never changes direction. In contrast, a quadratic relationship is represented by a curve that changes direction once, giving it a "U" or "V" shape. Therefore, C is the correct option that describes the difference between the two relationships.

A Quadratic Relationship Differs from a Linear Relationship in That…