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200 Chapter 2 Linear Equations in Two Variables and Functions Concept 1: Definition of a Function For Exercises 5–10, determine if the relation defines y as a function of x. (See Example 1.) 5. x y 6. 7. 1 2 x y 1 2 x y u 8. 9. 10. e10, 1.12, a1 21 511, 22, 13, 42, 15, 42, 1 bf 9, 326 2 1 2 , 8b, 11.1, 82, a4, x y 3 10 4 12 5 6 2 8 2 0 2 8 2 0 w x 23 24 y 25 z 26 Concept 2: Vertical Line Test For Exercises 11–16, use the vertical line test to determine whether the relation defines y as a function of x. (See Example 2.) 11. 12. 13. y x y x y x 14. 15. 16. y y x y x Concept 3: Function Notation For Exercises 17–20, consider a function defined by y f(x). 17. Interpret the meaning of f(2) 5. 18. Interpret the meaning of f(7) 8. x 19. Write the ordered pair represented by f(0) 2. 20. Write the ordered pair represented by f(10) 11.


miller_intermediate_algebra_4e_ch1_3
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