Function Review

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)

Look at the graph. Is the relation a function?

• yes

• no

Is this set of ordered pairs a function and how can you tell?

• Yes its a function because no y values repeat
• No it's not a function because there are negative numbers
• No it isn't a function because an x value repeats but has different y values 
• No it isn't a function because an y value repeats but has different x values

• Function
• Not a Function

• Function
• Not a Function

What is the domain of the graph?

• x ≥ -6

• -7 ≤ x ≤ 3

• -8 ≤ x ≤ 4

• x ≤ -6

• All real numbers

What is the range of the graph?

• y ≥ -6

• -7 ≤ y ≤ 3

• -8 ≤ y ≤ 4

• y ≤ -6

• All real numbers

What is the domain of the graph?

• x ≥ 1

• 1 ≤ x ≤ 5

• 1 ≤ x ≤ 4

• x ≤ 5

• All real numbers

What is the range of the graph?

• y ≥ 1

• 1 ≤ y ≤ 5

• 1 ≤ y ≤ 4

• y ≤ 5

• All real numbers

• {-2, 3, 7}

• [-2, 7]

• {1, 2, 3, 4}

• [1, 4]