Functions Review

Is the relation a function? Why?

• Yes, because the x-value 11 has two y-values paired 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 paired with it.

• No, because each x-value has only one y-value paired with it.

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)

Which graph does NOT pass the vertical line test?

• Graph 1
• Graph 2
• Graph 3
• Graph 4

• Function
• Not a Function

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}

What is the RANGE?

• -3 ≤ y < 2

• -3 < y ≤ 2

• -7 ≤ y ≤ 2

• -7 ≤ y < 2

What is the DOMAIN? **Watch for the hole (open circle)

• -3 ≤ x < 2

• -3 < x ≤ 2

• -7 ≤ x ≤ 2

• -7 ≤ x < 2

• all real numbers

• all real number less than or equal to -3

• all real numbers less than or equal to 2

• all real numbers greater than or equal to 2

Which is a zero of the graph?

• 0
• -1
• 1.5
• -3

• no solution

• 0

• 6

• -6