<p>How do you add programs to the Ti89? And where can I find a good program for stuff on Math II for Ti89's?? </p>
<p>Also, how do you do quadratic regression on calculators?!?!</p>
<p>quadreg: stat -> edit: L1 the X points, L2 the Y points, then stat -> calc -> quadreg -> formula.</p>
<p>wow NICEEEEEEEEEEEEEEEEEEE thanks.</p>
<p>What do I put for x and y after putting the points into L1 and L2? i’m in quadreg mode and it asks for x and y before I can click enter.</p>
<p>I tried putting l1 and l2 but it didn’t work</p>
<p>It says “argument must be a list”</p>
<p>got it, nvm.</p>