Texas Instruments TI-84 Plus Silver Edition

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Graphing the Derivative of a Function
Graphing the Derivative of a FunctionGraphing the Derivative of a Function
Graphing the Derivative of a Function
To view the graph of the derivative of a function, enter the function on the Y= menu. Then
move to an empty line of the Y= menu and enter this string of commands MATH, 8, 2
nd
VARS,
Y-VARS, Funtion, Y1, (comma) X, (comma) X).
To display the graphs of both the function and the derivative, enable both on the Y= menu and
press GRAPH . To display only the derivative, make sure it is the only function enabled on the
Y= menu.
Example: Display the graphs of both
3 2
2 3
( ) 5 9
3 4
f x x x x
= − − +
and its derivative.
Enter the function at Y= . Enter Math, 8, VARS, y-VARS, Function, (comma) X, (comma), X)
on an empty line of the Y= menu. Make sure both lines are enabled and any other entries in Y=
are disabled. Then press GRAPH .
Adjust the viewing window to see them better, if needed.
Example: Display the graph of the derivative of
3 2
2 3
( ) 5 9
3 4
f x x x x
= − − +
Using the display from the previous example, disable Y1 on the Y= screen and press GRAPH .