|Example: Graph the slope field for the differential equation: y ′ = x – y.|
|1. Change Graphing Mode to Differential Equations||Press MODE|
|Press right arrow key|
|Press 6 (for DIFF EQUATIONS)|
|Press ENTER (to SAVE)|
|2. Enter Differential Equation||Press Diamond key, then F1 (Y=)|
|NOTE: Use t for the independent variable and;
use y1 for y in the differential equation y1′, y2 for y in the differential equation y2′, etc.
|Type in differential equation|
|3. Change Solution Method||Press Diamond, then | key (for Graph Formats Menu)|
|NOTE: Changing the solution method needs to be completed
only once – we will not consider other solution methods in this course.
Choose EULER for Solution Method and SLPFLD for Fields.
|4. Graph the Slope Field||Press Diamond key, then F3 key|
|NOTE: You can zoom in or out on the graph using the F2 menu.|
|NOTE: You can change the resolution by pressing Diamond Key, then F2 and changing the value for fldres=.|