TI-84 Slope Formula Program (ACT/SAT Calculator Hack!)

Learn how to program your TI-84 calculator to find the slope between two points — a key algebra and geometry skill for ACT and SAT math!
This tutorial walks you through creating a TI-84 program that prompts for the first point (x, y), the second point (u, v), and automatically computes the slope using:

m = (v – y) / (u – x)

This is a great time-saving trick for linear equations and coordinate geometry questions on standardized tests.

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⏱ Timestamps
00:00 Intro
00:14 Creating a new program (SLOPE)
00:34 Displaying first point instructions
01:09 Prompting for x and y
01:28 Displaying second point instructions
02:02 Prompt for u and v
02:19 Writing the slope formula
02:47 Storing result to variable M
03:00 Displaying slope result
03:20 Running and testing the program
03:37 Example: (0,0) to (6,3) → slope = 1/2
04:00 Outro

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