Introduction to Functions

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1. Determine which of the following is a function.

A]  x2 - 6 = y2         B]  x = y2 + 6         C]  y = 4x - 2


 A is a function
B is a function
 C is a function

2.Determine which of the following is a function.

A]  { (7, 8), (7, 5), (3, 1) }         B]  { (0, 2), (-5, 0), (0, 5) }         C]  { (-6, 5), (2, 3), (0, 0), (7, 1) }



 A is a function
 B is a function
 C is a function

3. Which of the following is a function?

A] y = absolute value of x     B]  x^2 = y   C]  y = cos x

  A and B are functions.
  A and C are functions.
  B and C are functions.


4. Which of the following is in explicit form?

A]  x - 7y = 5         B]  y = 2x + 4        C]   x + w = y - 8



  A is explicit
  B is explicit
  C is explicit

5. Which of the following is in implicit form?

A]  (x - 5)2 + ( y - 2)2 = 16        B]  y = sin x         C]  y = 3x + 1


 A is explicit
 B is explicit
 C is explicit


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Copyright © 2006 Donna Tupper.