This document provides instructions for creating a slope formula template on a TI-Nspire CX graphing calculator. The instructions are: add two points to a graph, display their coordinates, use the text tool to input the slope formula, link the formula to the point coordinates so the slope automatically updates when the points are moved, and manipulate the points to test it.

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TI-­‐Nspire
CX
Mini-­‐Tutorials
Slope
Formula
Template
Summary of Keystrokes
Create a graph window and add two points:
c2
b71·b71·
(Use ¤¡`¢¤¡`¢to move the pointer to the second point.) ··
Display the coordinates:
b17b17 (Use ¤¡`¢¤¡`¢to move the pointer to the first point.) ··(Use
¤¡`¢¤¡`¢to move the pointer to the second point.) ··
Create a formula using the text tool:
b17b17
(Use ¤¡`¢¤¡`¢to move the pointer to a clear part of the screen.) Input the Slope Formula.
aa (Y2(Y2--Y1)Y1)pp(X2(X2--X1)X1) ··
~522/eb4~522/eb4
Link the formula to the coordinates:
b1b188
(Use ¤¡`¢¤¡`¢to move the pointer above the text formula.)
aa

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(Use ¤¡`¢¤¡`¢to move the pointer above x1.)
··
(Repeat for x2, y1, and y2.)
After you complete this process the value of the slope appears. Use the arrow keys to place
the value next to the slope formula.
··
Manipulate the points in the graph and watch the formula recalculate the slope:
`¢¤¡`¢¤¡aa¡¡