Texas Instruments TI-80 User Manual - Page 108
Drawing Lines
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Drawing Lines While a graph is displayed, LINE( lets you use the cursor to define a line on the graph. If a graph is not displayed, the instruction is copied to the Home screen. Directly on a Graph To define a line directly on a graph: 1. When a graph is displayed, select LINE( from the DRAW DRAW menu (item 2). 2. Position the cursor at the beginning point of the line you want to draw. Press ¸. 3. Move the cursor to the end point of the line you want to draw. The line is displayed as you move the cursor. Press ¸. From the Home Screen or a Program To continue to draw lines, repeat steps 2 and 3. To cancel LINE(, press M. LINE( (DRAW DRAW, item 2) draws a line between the coordinates (X1,Y1) and (X2,Y2). The values may be entered as expressions. LINE(X1,Y1,X2,Y2) For example, enter LINE(0,0,6,9) on the Home screen, and then press ¸. 7-4 Draw Operations