Chapter 4 - Quadratic Functions - 4.2 Graphing Quadratics in Vertex Form - 4.2 Exercises - Page 320: 54

Domain: All real numbers. Range: $b\leq 0$

Given$$ b(w) = -3w^2.$$ The parabola opens downward as we can see from the graph. Its vertex gives the maximum point. The domain and range are given by: Domain: All real numbers. Range: $b\leq 0$.