# Curves and functions in Ti-84 plus

• Mar 1st 2008, 03:43 AM
Coach
Curves and functions in Ti-84 plus
Dear forum members,

I was wondering, how does one enter the equation for for example descartes folium, if one wants to graph it on TI-84 plus?

• Mar 1st 2008, 03:53 AM
mr fantastic
Quote:

Originally Posted by Coach
Dear forum members,

I was wondering, how does one enter the equation for for example descartes folium, if one wants to graph it on TI-84 plus?

Not much chance using the Cartesian form unless you want to solve for y and get the three different branches using the cubic formula .... Even then there are certain problems ....

I'd suggest going to parametric function mode and using the parametric equations. Those equations can be found here.
• Mar 1st 2008, 04:35 AM
Coach
Thank you so much!

So in the parametic and polar equations I just choose any numbers for a and b?
• Mar 1st 2008, 05:12 AM
earboth
Quote:

Originally Posted by Coach
Thank you so much!

So in the parametic and polar equations I just choose any numbers for a and b?

1. Set the TI83/84 to parametric mode.

2. Use the equation you found at the link Mr. Fantastic gave you.

3. I've attached a screenshot what will happen for a = 1

(The invisible settings in the window are: ymin = -3, ymx= 3, yscl = 1)