What is a Non-Linear Function?
A non-linear function is defined as a polynomial function of degree 2 or higher.
Did you notice that the linear function is a polynomial function of degree 1?
A quadratic function is a polynomial function of degree 2, defined by an equation of the
form
y = a x2 + b x + c
The degree of a polynomial function is the degree of the polynomial itself.
Practice with Non-linear functions