APPLICATION

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

• Relation

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

• Function

• Range

• Domain

• Relation

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 = {(2,9), (6,4), (9,2), (6,7)}

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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Which of the following real-life relationships represent a function?

• The rule which assigns to each person the name of his aunt.

• The rule which assigns to each person the name of his father

• The rule which assigns to each cellular phone unit to its phone number

• The rule which assigns to each person a name of his pet.

Which of the following relations is NOT a function?

• The rule which assigns a capital city to each province

• The rule which assigns a President to each country

• The rule which assigns religion to each person

• The rule which assigns tourist spot to each province.

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

A person can encode 1000 words in every hour of typing job. Which of the following expresses the total words W as a function of the number n of hours that the person can encode?

• 𝑊(𝑛) = 1000 + n

• 𝑊(𝑛) = 1000/n

• 𝑊(𝑛) = 1000n

• 𝑊(𝑛) = 1000 − n

Judy is earning ₱300.00 per day for cleaning the house of Mrs. Perez and additional ₱25.00 for an hour of taking care Mrs. Perez’s child. Express the total salary (S) of Judy including the time (h) spent for taking care the child.

• 𝑆(ℎ) = 300 + 25ℎ

• 𝑆(ℎ) = 300 − 25ℎ

• 𝑆(ℎ) = 300(25ℎ)

• 𝑆(ℎ) = 300/25h