| First change the mode of your calculator to Differential
Equations under the menu GRAPH. |
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| Next enter the differential equation in one of the y
slots. Be sure to enter the equation as a function of y1 and
t.
The calculator is looking to write a differential equation that is a
function of t. So if you are solving a differential equation
 you will
enter  .
If you have to enter a differential equation that is a function of x and
y, such as
 , you
will enter it as
 |
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| Set the graph mode to match the choices at the right.
To access the Graph Mode window press —š
(which is the
key to the left of the 7 key) |
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| You must next set up a window appropriate to view the
differential equation. |
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| To display the slope field in the selected window press —GRAPH. |
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| You can also select a starting point through which you want
to pass a function. Return to the y slot and enter an initial value
point. For this first example let's draw a function with the given
slope field passing through (0,0). If you want the
function to pass through (2,4) first replace t0 with2 and yi1 with 4.
|
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| To view the graph again press —GRAPH. |
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| To view a family of graphs that have the same slope field,
but that have different starting points first type in the initial points
in a set in yi1:
Let's look at a family a function what have initial starting points of
{-2, 0, 3} |
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| You can also select an initial starting point interactively
with the graph. Press 2nd F8 and you will be prompted to give the
initial point. You can type in an initial t and an initial y(t)
value. Let's try (2,1) |
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| Here's the result: |
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| To clear your screen of the function and only view the slope
field press F4 - Regraph |
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