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Originally Posted by Kyle45
I figured I would just wait to buy an 89 until I could actually use it. (After ACT/SAT)
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I was allowed to use the 89 on the SAT back when I took it (gosh, over four years ago now). As far as I know you can still use it. It can pretty much do anything on the math portion but you have to know how to use it right. If you don't practice with it you will just be wasting valuable time. At first it may seem unfair to use such a powerful grapher on the test but you should give yourself every advantage within the rules. Symbolic manipulation is where this model shines above the rest (the others you have to use actual values). The 89 is one of the few things I have purchased in my life that has actually been worth every penny.
If it is not allowed on the SAT any more, please correct me!