Pre-Calculus Section 2.1 Practice

Is this mapping a function or not a function? 

• Function
• Not a Function

Is the relation a function? Why.

• Yes, because the x-value 11 has two y-values pair with it.
• Yes, because each x-value has only one y-value paired with it.
• No, because the x-value 11 has two y-values pair with it.
• No, because each x-value has only one y-value paired with it.

For the function {(0,1), (1,-3), (2,-4), (-4,1)}, write the domain and range.

• 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}

• Function
• Not a Function

What is the DOMAIN of the graph shown?

• (-4, 2]

• [-4, 2)

• [2, 5)

• (2, 5]

What is the domain of this mapping?

• {5, 10, 15}

• {(5,2),(5,4),(10,6),(15,8)}

• {2, 4, 6, 8}

• {5, 5, 10 ,15}

Which set of values is a function?

• (9,5) (10,5) (9,-5) (10,-5)
• (3,4) (4,-3) (7,4) (3, 8)
• (6,-5) (7, -3) (8, -1) (9, 1)
• (2, -2) (5, 9) (5, -7) (1, 4)

What is the RANGE?

• (-∞, ∞)
• (-2, ∞)
• [-2, ∞)
• (-∞, 0) U (0, ∞)

What is the range?

• (-4,5]
• [-4,5)
• (-3,3)
• [-3,3]

If f(x)=6x²-4,
what is f(-1)?

• -2
• 13
• 2
• 0