Solving Problems Involving Linear Functions

Which of the following functions should be used to solve problems involving a constant rate of change?

• exponential function

• linear function

• polynomial function

• quadratic function

Which of the following is the standard form of a linear function?

• f(x) = bx + m

• f(x) = bx - m

• f(x) = mx + b

• f(x) = mx - b

Mr. Nilo, a mathematics teacher, charges Php200 per hour for tutorial service to a junior high school student. If he spends 3 hours tutoring per day, how much would he receive in 12 days?

• . Php 6,300

• Php 7,200

• Php 7,300

• Php 8,100

Beverly’s car uses 15 liters of gasoline to travel 120 kilometers. At that rate, how many liters of gasoline will her car consume to travel 130 kilometers?

• 15.25 liters

• 16.25 liters

• 17.25 liters

• 18.25 liters

Joshua likes to read a magazine. He reads 50 pages in 2 hours. At the same rate, how many hours will it take him to read the remaining 150 pages?

• 6

• 7

• 8

• 9

Lyoid works as a service crew in a fast food center where he earns Php82.00 per hour. How much will he earned in a day if he works 8 hours straight?

• Php 556

• Php 656

• Php 756

• Php 856

Lyoid works as a service crew in a fast food center where he earns Php82.00 per hour. How much will Lyoid earn in 3 days?

• Php 1,668

• Php 1,968

• Php 2,268

• Php 2,568

Queenie is working in a restaurant and her hourly wage is Php51.68. Let x represents the number of hours worked and let f(x) represents the total amount earned. Which of the following functions best represents the total amount earned by day?

• f(x) = 51.68x

• f(x) = x + 51.68

• f(x) = x - 51.68

• f(x) = 51.68 - x

Queenie is working in a restaurant and her hourly wage is Php51.68. Let represents the number of hours worked and let f(x) represents the total amount earned, if Queenie works 8 hours a day, how much will she earn in 14 days?

• Php 4,778.16

• Php 4,878.16

• Php 5,788.16

• Php 5,878.16

JC works as a salesman in a company that distributes top brands and latest model of cellular phones. He receives a commission of Php1,500 for every cellular phone unit he sells. On top of the commission, he receives a monthly salary of Php12,000. What is his commission if he sells 25 cellphones in a month?

• Php 27,000

• Php 37,500

• Php 46,500

• Php 47,500