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# Alg 2 sections 2.1

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### Alg 2 sections 2.1

1. 1. Represent Relations and Functions Section 2.1
2. 2. Relations •A mapping, or pairing, of input values with output values. •The set input is known as the domain. •The set of output is known as the range.
3. 3. Relations Ways to represent relations. • Table • Mapping Diagrams Input Output Input (liters) 1 5 12 15 Output (wons) 2000 10,000 24,000 30,000 1 2 3 5 0 1 2
4. 4. Relations Ways to represent relations. Ordered Pairs • (-2, 2) • (3, 4) • (1, 7) Graph
5. 5. Functions • y = 8000xx yy = 8000x
6. 6. Functions Input Function Output Domain Range x yy = 8000x A functions is a relation for which each input has exactly one out put. If any input of a relation has more than one output, the relation is not a function.
7. 7. Function or Not 1 3 5 0 1 2 Input 0 7 8 7 23 Output 1 5 8 5 10
8. 8. Function or Not (2, 3), (3, 4) (-1,3), (4, 3)
9. 9. Homework Handout Writing Equations of Lines Pages 76-77 #3-7 odd, 10-13 all, 21-23 all Page 86 #19-27 odd Page 93 #9-19 odd