Quadratic Vertex Finder TI-84 Program

From here you can either download the program for free onto your computer and then on to your calculator. (don’t worry we’ll walk you through it). Or you can use method 2 and type the code into your calculator by hand. After that, keep scrolling on this page for instructions on what the program does and how to use it.

Quadratic Vertex Finder Code

Method 1 (Download)

1. To download the program click the link below.

Download Program

2. Click <here> for a tutorial on how to get the program on to your calculator after you have downloaded the file.

3. Keep scrolling to see how the program works and how to use it (optional).

4. The program is currently stored in your calculator’s ram. Click <here> to see a tutorial on how to save the program permanently.

Method 2 (Type)

1. See how to start a program on your calculator <here> (optional).

2. Begin typing in the code shown in the image below.

Do NOT individually type in the colons, or the “PROGRAM:EXAMPLE” name, the colons will show up automatically when you start a new line by pressing [enter]. The “PROGRAM:EXAMPLE” will already be at the top.

Having trouble finding the character or function you see in the code? See how to type any function/character/symbol on your TI-84 Plus>>.

Quadratic Vertex Finder TI-84 Program

*WARNING*: If you clear the ram on your calculator the program will be lost. To see how to save your work permanently click <here>.

How To Use The Program

Begin by opening the program. From the home screen, press [prgm] then scroll to the program (mine is named “VERTEX”). Then press [enter] and then [enter] again.

Finding Vertex on TI-84 plus

The program will then prompt you to enter the A, B and C constants from your quadratic equation in the form y=ax^2+bx+c. For example if my equation was -x^2+4x+8 I would enter the following into the program. (as seen in image below)