So hopefully I'm posting this in the right area and all that...

I missed a day of trig class and don't understand how to do several kinds of problems relating to exponential functions. I have a test tomorrow, so I really need to figure how to solve them.

Here's an example...

1. Write an exponential equation, y = ab ^ x, for each of the following sets of points:

a) (3, 550) and (5, 1450)

b) (2, 300) and (20, 3500)

Thank you in advance for your help!