Exponential Expressions

$\rhd$ 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 $y = 3^x$ and uses that table of values to sketch a graph. He also uses a chain letter as an example of an exponential function.
$\rhd$ Initial value and common ratio of exponential functions (5:26) Using examples $h(n) = \frac{1}{4} \cdot 2^n$ and $f(t) = 5 \cdot 3^t$ , learn about the initial value and the common ratio.
$\rhd$ 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: $g(x) = a \cdot r^x$ .

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The OpenLab at City Tech:A place to learn, work, and share

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