FUNCTIONS Evaluating A Function (Page 13 of 14)

If the function has been graphed, you can also evaluate the function at a desired x-value directly from the graph. The x-value used must be within the current window; that is, it must be between Xmin and Xmax.

First graph the function f(x) = 3x^2-5x+2, which has already been entered in the function editor as Y3. A standard window will suffice for now (we will explore graphing in more detail later on).

ZOOM key. 6: menu selection. Calculator screen image.
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