User Manual

Chapter 5: Differential Equation Graph Application 24
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1. Start up the eActivity application and input the following expression and
matrix.
y’ = exp(x) + x
2
[0,1]
2. From the eActivity application menu, tap [Insert], [Strip(2)], and then
[DiffEqGraph].
• This inserts a Differential Equation Graph data strip, and displays the Differential Equation Graph window in
the lower half of the screen.
3. Drag the stylus across “
y’ = exp(x) + x
2
” on the eActivity application window
to select it.
4. Drag the selected expression to the Differential Equation Graph window.
• This draws the slope field of
y’ = exp(x) + x
2
and registers the equation in
the differential equation editor ([DiffEq] tab).
5. Drag the stylus across “[0,1]” on the eActivity application window to select it.
6. Drag the selected matrix to the Differential Equation Graph window.
• This graphs the solution curve of
y’ = exp(x) + x
2
in accordance with the
initial condition defined by the matrix and registers the initial condition in
the initial condition editor ([IC] tab).