Lesson 1 - Online Quiz (Representing Functions)

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/are function/s?

• x = {(1,2), (3,4), (1,7), (5,1)}

• g = {(3,2), (2,1), (8,2), (3,7)}

• h = {(4,1), (2,3), (2, 6), (7, 2)}

• y = {(2,9), (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}

• a

• b

• c

• d

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

Johnny was paid a fixed rate of ₱ 100 a day for working in a Computer Shop and an additional ₱5.00 for every typing job he made.

How much would he pay for a 5 typing job he made for a day?

• ₱55.00

• ₱175.50

• ₱125.00

• ₱170.00

Johnny was paid a fixed rate of ₱ 100 a day for working in a Computer Shop and an additional ₱5.00 for every typing job he made.

Find the fare function f(x) where x represents the number of typing job he made for the day.

• 𝑓(𝑥) = 100 + 5𝑥

• 𝑓(𝑥) = 100 − 5𝑥

• 𝑓(𝑥) = 100𝑥

• 𝑓(𝑥) = 100/5𝑥