Algebra-1

The function is nonlinear because its graph is curved.

Here's why each option applies or doesn't apply:

A. "This is a nonlinear function because it goes down and up."

This statement describes the general behavior of the graph but does not directly indicate whether the function is linear or nonlinear. Many functions, both linear and nonlinear, can exhibit upward or downward movements on their graphs.

B."This is a nonlinear function because it is vertical."

The verticality of a function's graph typically refers to its steepness or slope at ...