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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

• Test corrections: -3 points if submitted by tomorrow.

• Linear programming projects due next week!

• 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

• Use it to determine if the graph is a function or not.

• (Philip, 14), (Kara, 15), (Mia, 14), (Harry, 16)

x =

y =

• (-2, 3), (0, -9), (2, 5)

• (4, 8), (5, 9), (4, 9)

• (3, 0), (5, 0), (-8, 0)

• f(x) = “f of x”

• f(x) = y

• x is the input

• y is the output

• Given f(x) = 3x + 2, find f(-2), f(0), and f(4).

• Given h(t) = 2t2 – 4. Find h(3).

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