Introduction to Functions

Is this mapping a function or not a function? 

• Function

• Not a Function 

Which relation diagram represents a function?

• W

• X

• Y

• Z

Which relation diagram represents a function?

• Z

• Y

• X

• W

Which of the following relations describes a function?

• A

• B

• C

• D

What is the range of the function shown?

• {-5, -3, -1, 3, 5}

• 3 ≤ y ≤ 6

• -5 ≤ x ≤ 5

• {3, 6}

Which relation is NOT a function?

• {(1,-5), (3,1), (-5,4), (4,-2)}

• {(2,7), (3,7), (4,7), (5,8)}

• {(1,-5), (-1,6), (1,5), (6,-3)}

• {(3,-2), (5,-6), (7,7), (8,8)}

Which relation is a function?

• {(2, 3) , (1, 5) , (2, 7)}

• {(-1, 5) , (-2, 6) , (-3, 7)}

• {(11, 9) , (11, 5) , (9, 3)}

• {(3, 8) , (0, 8) , (3, -2)}

Which relation is a function?

• 
• 
• 
• 

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain.
Remember:  Domain is x 
(x,y)

• D: {1, -3, -4,}
  R: {0, 1, 2, -4}

• D:{0, 1, 2, -4}
  R:{1, -3, -4}

• D:{0, 1, 2, 3, 4}
  R:{1, -3, -4}

What is the range of the mapping?

• {1, 2, 4}

• {0, 1, 2, 3}

• {0, 3}

• {1, 4}