What is the easiest way to find the equation of a line that runs through 2 points on a TI-83 Plus?
in TI-83 Plus Graphing Calculators by

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
To avoid this verification in future, please log in or register.

1 Answer

Press STAT

press ENTER on 1: Edit

If L1 and L2 are empty skip this step, if there are values in the lists then go up so that L1 is highlighted and press CLEAR and then go down.  (Do not press DEL because that deleats the entire list and I don't really know how to get it back.)  Do the same for L2.

L1 represents X values and L2 represents Y values, so plug in your points so that X is in the same row as its coorisponding Y value.

When both of your points are entered press 2nd Quit

press STAT

press the right arrow to highlight CALC and go down to 4: LinReg (ax+b)

press Enter and it gives you the equation for your line.

Hope this is helpful, respond if you have any more questions.

P.S.  I think it is easier just to find your equation algabraically but as you progress in math you will have to find equations for quadratic equations and trigometeric equations and you will be able to follow these same steps but select a different Reg at the end.
by
Welcome to the calculatorti.com Texas Instruments Graphing Calculator questions and answers page and calculator help forum, Help build our members by asking and answering questions on TI-83, TI-83 Plus, TI-84 Plus, TI-89, TI-89 Titanium or any other Texas Instruments graphing calculator model.
588 questions
185 answers
1 comment
21,659 users