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Here Im going to show how you can use the value and trace commands on the calculator to find the values or outputs of a function from the graph screen. Our sample problem will be given the function f of x is negative 0.5 x square plus 7 x plus 12, use the graphing features of the calculator to evaluate f of negative 2, f of 1.573, and f of 20. Now we could easily complete these exercises from the home screen, but I want to show how we can use the graphing features. So first thing I will do is Im going to show how to use the value command, and I will first input the function in the y equals screen. So turning the calculator on, pressing y equals, and inputting the function negative 0.5 x squared plus 7 x plus 12. Now Im going to graph the function, and my window is the standard window, right, now, so the standard window means the x min negative 10, x max is 10, and the scale, the markings on the x axis, are ones, and same on the ys, y min negative 10,