Test 1 - Possible Questions
 -Limit exists or not exists for a,b values
 -make a function continuous for a,b,.... values
 -limits (2-4, selections various)
     *rationalizaing numerator
     *limits at infinity involving sqrt
     *def. of derivative
 -tangent line - explicit and implicit d/dx
 -related rate - probably involving right triangle relation
 -find a,b, etc. for a function given an extremum or tangent line