Texas Instruments TI-84 Plus Guide Book

Chapter 3: Function Graphing 130
2. Press † or }, if necessary, to move the cursor to the first function, and then press
Í.
Second curve? is displayed in the bottom-left corner.
3. Press † or }, if necessary, to move the cursor to the second function, and then
press Í.
4. Press ~ or | to move the cursor to the point that is your guess as to location of the
intersection, and then press Í.
The cursor is on the solution and the coordinates are displayed, even if
CoordOff format
is selected.
Intersection is displayed in the bottom-left corner. To restore the free-moving
cursor, press |, }, ~, or †.
dy/dx
dy/dxdy/dx
dy/dx
dy/dx (numerical derivative) finds the numerical derivative (slope) of a function at a point,
with H=1âL3.
To find a function’s slope at a point, follow these steps.
1. Select
6:dy/dx from the CALCULATE menu. The current graph is displayed.
2. Press } or † to select the function for which you want to find the numerical
derivative.

Texas Instruments TI-84 Plus Specifications

General

Battery type	AAA
Power source	Battery
Number of batteries supported	4
Type	Graphing
Cover	No
Form factor	Pocket
Control type	Buttons
Product color	Black
USB port	Yes
USB 2.0 ports quantity	1
Digits	- digits
Display number of lines	8 lines
Display number of characters	16
RAM capacity	0.024 MB
ROM capacity	0.480 MB
Storage media type	-