2.1 Functions
Function: A relation that assigns every element in
set D (domain) to only one element in set R
(range).
[all X-Values are different]
Function notation: f(X) = y "f of X"
does not mean f o X! Example 1: Determine Whether each relation represe

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Review
1. Find the following values for g(X) = X
X + 2
3- g(0) b- g0) 0- g(-X)
d. -g(X) e. g(x+l) f. g(x+h)
State the domain of each function.
2. g()=1/+l 3. h( )= 2
X X X X2X_9 Example 4: Given the graph, answer the following:

Setting up Equations and Applications
Example 1: Solve
a. Laura is paid time-and-a-half for hours
worked over 40 hours. She was paid $442 for
working 48 hours. What is her regular hourly
wage?
wzwage
Mil/o: -l(MIL-0nd-o-lmlc
H0w+ (KO-5‘0 =‘lLIQ
40w Jr law