How do you create an exponential function y=ab^x given (21,200) and (23.392)?

##y=1*1.00014871^x##

##23.392=a*b^21200## There are two variables, so I'll assign 1 to a ##23.392=1*b^21200->## ##23.392^(1/21200)=(b^21200)^(1/21200)->## ##1.00014871=b## So the equation is ##y=1*1.00014871^x##