Knowledge Base

Solution 11582: Finding the Zero of a Function on the TI-83 Plus and TI-84 Plus. 

How do I find the zero of a function on the TI-83 Plus and TI-84 Plus?

To find the zero of a function on the TI-83 Plus and TI-84 Plus, the zero command will need to be used. Please refer to the following example.

Example: Find the zero of the function: y = 2X + 4

Solution:

1) Press [Y=].
2) Enter the function.
3) Press [GRAPH].

4) Press [2nd] [CALC] [2].
5) When prompted for "Left Bound?", specify the left bound for x using the arrow keys or enter a value and press [ENTER].
6) When prompted for "Right Bound?", specify the right bound for x using the arrow keys or enter a value and press [ENTER].
7) When prompted for "Guess?", move the cursor close to the zero value or enter a value and press [ENTER].

The screen will show the zero, which is (-2, 0).

 

Please see the TI-83 Plus and TI-84 Plus guidebooks for additional information.