Application Guide
ODE entry line:
• y1 ODE identifier
• Expression k·y1 defines the relation
• Fields (1,1) for specifying initial condition
• Buttons for adding initial conditions and setting plot parameters
Slider to vary coefficient k of the ODE
Slope field
A solution curve passing through the initial condition
To Graph a Differential Equation:
1. From the GraphEntry/Edit menu, select DiffEq.
The ODE is automatically assigned an identifier, such as “y1.”
2. Move to the relation field and enter the expression that defines the relation. For
example, you might enter -y1+0.1*y1*y2.
3. Enter the initial condition for the independent value x
0
and for y1
0
.
Note: The x
0
value(s) are common to all the ODEs in a problem but can be entered
or modified only in the first ODE.
Graphs Application 187