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Introduction to exponential functions (7:40) Sal investigates a function where the variable is in the exponent, rather than the base. In particular, he computes a table of values for
and uses that table of values to sketch a graph. He also uses a chain letter as an example of an exponential function.
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Initial value and common ratio of exponential functions (5:26) Using examples
and
, learn about the initial value and the common ratio.
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Finding the equation of an exponential function from a graph (7:37) Sal finds the equation of an exponential function using two points on the graph and the general form of the equation of an exponential function:
.