Chapter 4 - Quadratic Functions - 4.2 Graphing Quadratics in Vertex Form - 4.2 Exercises - Page 319: 45

Domain: The set of all real numbers. Range: $(\infty , 4]$

The graph in the problem shows that the parabola opens downward and has its vertex at the point $(h,k)= (-1,4)$. This is the maximum point of the parabola since it faces downward. The domain and range of the function are given below. Domain: The set of all real numbers. Range: $(\infty , 4]$