Algebra-1

The equation that does not describe a nonlinear function is: x−3y=21

Let's analyze why:

Linear Function Criteria: A linear function has the general form y=mx+b or can be rearranged to express y as a linear function of x without involving any other powers or roots of x or y.

Analysis of Each Equation:

A. y = 7x³ : This equation is nonlinear because y is proportional to x³, which is a cubic relationship.

B. y = 8x² + ...