1. The problem statement, all variables and given/known data You can use the following special computer to determine values f(x) of a certain function f. Use these values to determine which of the following numbers best approximates f '(2). There is a calculator provided: http://oregonstate.edu/instruct/mth251/cq/Stage5/Onward/mysteryFunction.html I know it says it is for a quiz, I'm not taking a quiz. 2. Relevant equations f'(a) = lim x-->a [f(x) - f(a)] / x-a or lim h--> 0 [f(a+h) - f(a)] / h 3. The attempt at a solution So, I know f(2) = 6, f(3) = 24 etc. so f'(2) = lim x-->2 [f(x)-f(2)]/x-2 if I put in 2 for "x" then I get a division by zero problem. I'm lost as to where to go from here. Help?