## Precalculus (10th Edition)

The given expression is a polynomial of degree $1$.
A monomial is an expression of the form $ax^{k}$, where $x$ is the variable, the exponent $k$, a nonnegative integer, is the degree, and $a$ is the coefficient of the term. A polynomial expression is 0either a single monomial or a SUM of several monomials. The degree of the polynomial is the degree of the monomial with the highest degree. The given expression is a sum of $(1)$ and $(-4x)$, two monomials. The first has degree $0$, and the second has degree $1$. This is a polynomial of degree $1$.