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Warm-up Date 12/08/09 Pre-Section 5-2 Relations and Functions

Warm-up Date 12/08/09 Pre-Section 5-2 Relations and Functions. . 2. Graph each point on a coordinate plane. . 4. . 3. . 1. Evaluate each expression. Date 12/08/09 Sec 5-2 Relations and Functions. Goal. To identify relations and functions To evaluate functions.

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Warm-up Date 12/08/09 Pre-Section 5-2 Relations and Functions

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  1. Warm-up Date 12/08/09 Pre-Section 5-2 Relations and Functions .2 Graph each point on a coordinate plane. .4 .3 .1 Evaluate each expression.

  2. Date 12/08/09 Sec 5-2 Relations and Functions

  3. Goal • To identify relations and functions • To evaluate functions

  4. ...And Why To determine whether a relation is a function, as in Examples 1 and 2

  5. Key Words Relation: Any set of ordered pairs. Function: A relation is a function if for every input there is exactly one output. Domain: In a function,the domain is all of the input values, or values of x. Range: In a function, the range is all of the output values, or values of y.

  6. Key Words Vertical-Line Test for Functions: A graph is a function if any vertical line intersects the graph at no more than one point. Function Notation: Use f(x) to indicate the outputs.

  7. range range domain domain Use a mapping diagram to determine whether each relation is a function. no yes

  8. Use the vertical-line test to determine whether each relation is a function. . . . .

  9. Make a table for each function. Use 1, 2, 3, and 4 for the domain.

  10. Find the range of the function rule f(g) = –2g + 4 for each domain. range:

  11. Did we achieve our goal? • To identify relations and functions • To evaluate functions

  12. On-Line Help Web Site: PHSchool.com Tutor Web Code: ate-0502 Lesson Quiz Code: ata-0502

  13. Planner: • Write today’s goal. • Write today’s assignment.

  14. Assignment: • Pg 2592 – 22 e, 32 – 35 a, 38 – 40 e, 54 – 58 e • Reflective journal

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