Functions Pre Test

What do you call a relation where each element in the domain is related to only one value in the range by some rules?

• Function

• Range

• Domain

• Independent

Which of the following relations is a function?

• x = {(1,2), (3,4), (1,7), (5,1)}

• g = {(3,2), (2,1), (8,2), (5,7)}

• h = {(4,1), (2,3), (2, 6), (7, 2)}

• y = {(9,9), (3,4), (9,2), (6,7)}

In a relation, what do you call the set of x values or the input?

• Piecewise

• Range

• Domain

• Dependent

What is the range of the function shown by the diagram?

• R: {3, 2, 1}

• R: {a, b}

• R: {3, 2, 1, a, b}

• R: {all real numbers}

Which of the following tables represent a function?

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• 
• 
• 

A person is earning ₱500.00 per day for doing a certain job. Which of the following expresses the total salary S as a function of the number n of days that the person works?

• 𝑆(𝑛) = 500 + 𝑛

• 𝑆(𝑛) = 500/n

• 𝑆(𝑛) = 500n

• 𝑆(𝑛) = 500 − 𝑛

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

• Function
• Not a Function

Is this mapping a function or not a function? 

• Function
• Not a Function

All of the y values or outputs are called what?

• Domain
• Range
• Relation
• Function