A local store’s monthly revenue from T-shirt sales, [i]f[/i]([i]x[/i]), as a function of price, [i]x[/i], is modeled by the function [i]f[/i]([i]x[/i]) = −5[i]x[/i][sup]2[/sup] + 150[i]x[/i] − 7. Use the equation and graph to answer the following questions: At what prices is the revenue increasing? Decreasing? What is the maximum revenue? What prices yield no revenue? Is the function even, odd, or neither?

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