HP 48G Linear Regression Best Fit Line

[Rodger Rosenbaum]

I see a problem. I was looking at an earlier version of ORTH when I posted it a while ago.

The ORTH program needs a couple more items at the end:

<< LR SWAP DROP DUP CORR DUP SIGN 4 ROLLD SQ / SWAP INV -
2 / DUP SQ 1 + √ ROT * + DUP ΣX * NEG ΣY + NΣ / { 2. 1. } →ARRY >>

Make this change shown in red to ORTH and see if it all works.