Anonymous posted an answer for this Texas Instruments TI-84 Plus Calculator:
"enter your data into L1 as x-coordinates and L2 as y-coordinates at (STAT) + (EDIT) and..."
Anonymous posted an answer for this Texas Instruments TI-84 Plus Calculator:
"just press (2nd) + (MEM)+(7) + (1)+ (2) and then try again.;)"