HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 54

Goto This function allows you to move directly to a point on the graph without having to trace along the graph. It is very powerful and useful. Suppose we begin with the cursor at x = 0 on F1(X) as shown right. Press and then to see the input form shown right. Type the value 3 and press ENTER. The cursor will jump straight to the value x = 3, displaying the (X,Y) coordinates at the bottom of the screen. A very nice feature of the key is that it will jump to values which are not on the current screen, or which would be inaccessible for the current scale. For example, we can jump to the value x = 100 and see the (X,Y) coordinate displayed, with the cursor positioned at the far right side of the screen. Similarly, you could jump to the value x = √2 despite this value being inaccessible for the scale chosen, since the cursor will normally only move to the values defined by the dots on the screen. Calculator Tip The key will also accept calculated values. You could, for example, jump to a value such as e2+2. If you had recently found an intersection, then jumping to a value of Isect would return the cursor to that point. This is useful when finding areas between functions. See page 58 for information on Isect. See page 70 for an example of finding areas between curves using . 54