Pre-Calculus Set 1 |Function||A function is a rule between two
sets of numbers where each number in the first set, called the
domain, is related to ONE number in the second set, called the
range. (x-variable, independent variable, input variable). Is
expressed as f of x, or f(x)| |Example of a function||When we
think of a function, we generally think of a formula. As an
example, the speed in feet per second of the space shuttle
Atlantis t seconds after launch can be modeled by the quadratic
function| S(t) = 0.0002t3 - 0.076t2 + 38.731t + 837.53. This
represents a function because for any value of t there is only
one value of S. In this example, t is the independent variable
and S is the dependent variable. |Piece-wise function||A piece-
wise function is a single function made up of pieces of other
functions.|