how efficient is a graphical calculator to using least square method in deriving a relationship(model) between two variables

i need a particular refrence for answer to the question

Asked by demaaz on 13 Sep 13:41

Last updated by anonymous on 15 Mar 15:00

Answered by CherieS on 15 Mar 15:00

solved your problem on my 828 in about 70 seconds.Very efficient

A = 25.64

B = -0.2075

r = -0.782472654

where A and B are reversed relative to your values. That is because the 828 uses the model

y = A + Bx

while the TI-82 uses the model

y = ax + b