Draw the graph off(x) = 3x +  − 25in the window [0, 25] by [0, 50]. Use the trace feature...

Draw the graph of

f(x) = 3x +  − 25

in the window [0, 25] by [0, 50]. Use the trace feature of the calculator or computer to estimate the coordinates of the relative minimum point. Then determine the coordinates algebraically. Convince yourself both graphically (with the calculator or computer) and algebraically that this function has no inflection points.