> Calculators are useless on the SAT anyway.

Graphing calculators can be used to quickly solve certain problems, like simultaneous equations or quadratics. They can also be used to plug in multiple-choice answers to see which one is correct, without knowing how to solve a problem the normal way (or not taking the time to, at any rate).

The new adaptive digital SAT complicates things a bit, in that some questions are not multiple choice.