Identifying and Graphing Linear Functions in Real Life

A car rental company charges a flat fee of $50 plus $0.20 per mile driven. Write a linear function to represent the total cost (C) in terms of miles driven (m). What is the cost for driving 100 miles?

• $90

• $50

• $100

• $70

The temperature in a city increases by 2 degrees every hour starting from 20 degrees. Write a linear equation to represent the temperature (T) after h hours. What will the temperature be after 5 hours?

• 35 degrees

• 40 degrees

• 30 degrees

• 25 degrees

A gym charges a monthly membership fee of $30 plus $10 for each class attended. Write a linear function for the total cost (C) based on the number of classes (c) attended. How much would it cost to attend 8 classes?

• $90

• $130

• $70

• $110

A farmer sells apples for $2 per pound. If he sells x pounds of apples, write a linear equation for the total revenue (R). How much revenue does he generate from selling 50 pounds?

• $150

• $120

• 100

• $80

A phone plan costs $25 per month plus $0.10 per text message. Write a linear function to represent the total cost (C) based on the number of text messages (t) sent. What is the total cost if 200 text messages are sent?

• $30

• $45

• $25

• $50

A school is planning a field trip and charges $15 per student. Write a linear equation for the total cost (C) based on the number of students (s). If 30 students sign up, what is the total cost?

• The total cost is $450.

• $300

• $600

• $150

A delivery service charges a base fee of $5 plus $1.50 per mile. Write a linear function to represent the total charge (C) for a delivery of m miles. What is the total charge for a delivery of 10 miles?

• 15

• 20

• 25

• 30

A concert ticket costs $50, and there is an additional service fee of $5. Write a linear equation for the total cost (C) of buying t tickets. How much would it cost for 4 tickets?

• $200

• $205

• $180

• $150

A bookstore sells notebooks for $3 each. Write a linear function to represent the total cost (C) for buying n notebooks. If a student buys 10 notebooks, what is the total cost?

• $20

• $25

• $30

• $15

A taxi charges a flat rate of $2.50 plus $0.75 per mile. Write a linear equation for the total fare (F) based on the number of miles (m) traveled. What is the fare for a trip of 15 miles?

• $13.75

• $10.50

• $12.25

• $15.00