4.2: Function Notation

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# 4.2: Function Notation - PowerPoint PPT Presentation

4.2: Function Notation. Announcements. Test corrections: -3 points if submitted by tomorrow . Linear programming projects due next week! Read the instructions!. Vocab. Relation: any relationship between two variables. Set of ordered pair. Ex: (1, 2)

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### 4.2: Function Notation

Announcements
• Test corrections: -3 points if submitted by tomorrow.
• Linear programming projects due next week!
Vocab
• Relation: any relationship between two variables.
• Set of ordered pair. Ex: (1, 2)
• Function: for every “x” value there is only one “y” value.
• The “x” never repeats!
• Domain: x-coordinates
• Range: y-coordinates
Vertical Line Test
• Use it to determine if the graph is a function or not.
Are these functions?
• (Philip, 14), (Kara, 15), (Mia, 14), (Harry, 16)

x =

y =

• (-2, 3), (0, -9), (2, 5)
Are these functions? cont.
• (4, 8), (5, 9), (4, 9)
• (3, 0), (5, 0), (-8, 0)
Function Notation
• f(x) = “f of x”
• f(x) = y
• x is the input
• y is the output
Example
• Given f(x) = 3x + 2, find f(-2), f(0), and f(4).
• Given h(t) = 2t2 – 4. Find h(3).
H.W

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