We used the equation for compound interest to solve a question regarding how much money should be deposited in various accounts if we wanted to earn $3000 in 3 years. Alexa took notes while I worked the exercise on the board. She discovered that it was best to put money into an account earning 4% interest, compounded annually, rather than into an account earning less interest but compounded more frequently.
We then transitioned into graphing exponential functions. We used graphs to discover why f(x)=b^x has to have b>0, but not equal to 1, in order to be an exponential function.