HP 40gs HP 39gs_40gs_Mastering The Graphing Calculator_English_E_F2224-90010.p - Page 51
Simultaneous, Connect, Axes, Labels, Grid, The fifth option
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Simultaneous The first option Simult controls whether each graph is drawn separately (one after the other) or whether they are all drawn at the same time, sweeping from left to right on the screen. My preference is to turn this off. I find that if there are more than two functions defined then drawing them all at the same time can be confusing. Turning off Simult means that they are drawn one after the other, in the order that they are defined. This is obviously a bit slower but makes it easier to understand. Connect The second option Connect controls whether the separate dots that make up a graph are connected with lines or left as dots. This is very seldom of use. vs... Axes The third option Axes controls whether axes are drawn. The fourth Inv. Cross controls the appearance of the cursor that is moved by the arrow keys. It is best if you try this one yourself to see the effect. Labels The fifth option Labels controls whether labels ('X', 'Y') and a scale are put on the axes. The only time this causes problems is if the scale is an odd one, causing the labels to have too many decimal places. If desired this effect can be offset by setting fixed decimal places in the MODES view. Grid The sixth and last option Grid causes a grid of dots to be drawn on the screen (see right). The density of the grid is controlled by the values of Xtick and Ytick. This can be quite useful. 51
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