Functions Unit Review

What is the range of this function?

• x ≥ 2

• x ≤ 2

• y ≥ 2

• y ≤ 2

Which statement is correct about the mapping diagram?

• The relation IS NOT a function because some domain values are mapped to more than one range value.

• The relation IS a function because each domain value is mapped to only one range value.

• The relation IS NOT a function because some range values are mapped to more than one domain value.

• The relation IS a function because each range value is mapped to only one domain value.

Answer explanation

Functions only require that each input is unique (has no repeating values). The diagram shows that each input maps to exactly one output.

• Function
• Not a Function

What is the range of this relation?

• {-2, -1, 0, 1, 2}

• {1, 1.5, 2, 2.5, 3}

Which graph does NOT represent a function?

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

Which graph represents a linear function?

• 
• 
• 
• 

Which of the following is a linear function?

Which segment represents an object moving faster over time?

• A

• B

• C

• D

Could the table of values represent a linear function?

• No, because the rate of change is not constant.

• Yes, because the rate of change is increasing constantly.

• No, because the rate of change is not constantly increasing.

• Yes, because the rate of change is constant.

Which segment represents returning home?

• A

• B

• C

• D

• E