S1 Final Exam Part 2 Review

John’s internet plan charges $3.15 per GB in addition to a $45 monthly fee. In May, he used 50 GB and was charged $202.50. How much was he charged in June, when he used 70 GB?

• $265

• $245.50

• $265.50

• $245

Sarah’s electric company charges a base fee of $27 per month, plus $2.50 per kWh (kilowatt-hour) of electricity used. In March, she used 30 kWh and was charged $102. How much will she be charged in April, when she uses 250 kWh?

• $600

• $652

• $552

• $650

A parking garage charges a flat fee of $7 to park, plus $1.25 for every hour the car is parked. In April, Tom parked for 8 hours and was charged $17. How much will he be charged in May, when he parks for 9 hours?

• $22

• $18.50

• $18.25

• $18

Mia's water company charges a base fee of $25 per month, plus $0.10 per gallon of water used. In July, she used 400 gallons of water and was charged $65. How much will she be charged in August, when she uses 600 gallons of water?

• $25

• $85

• $80

• $70

The slope of a hill next to a river decreases 22 vertical feet for every 15 horizontal feet away from the river. Which function represents the vertical distance as a function of the horizontal distance, and what is the vertical distance, v(t), from the river when the horizontal distance, h, is 18 feet?

The slope of a hill next to a river decreases 8 vertical feet for every 13 horizontal feet away from the river. Which function represents the vertical distance as a function of the horizontal distance, and what is the vertical distance, v(t), from the river when the horizontal distance, h, is 22 feet?

Sarah has $9,000 in a savings account. She plans to use the money to pay for her vacation expenses. The graph on the coordinate grid shows a linear function of the money left in her account as she pays for her trip over several months. What is the value of the x-intercept of the graph of the function, and what does it represent?

• It is 15, and it represents the total amount, in thousands of dollars, she must spend.

• It is 15, and it represents the number of months after which the account equals $0.

• It is 13, and it represents the number of months after which the account equals $0.

• It is 13, and it represents the total amount, in thousands of dollars, she must spend.

James has $24,000 in his emergency fund. He plans to use the money to pay off unexpected medical bills. The graph on the coordinate grid shows a linear function of the money left in his fund as he pays for the bills over several months. What is the value of the x-intercept of the graph of the function, and what does it represent?

• It is 36, and it represents the total amount, in thousands of dollars, he must spend.

• It is 39, and it represents the total amount, in thousands of dollars, he must spend.

• It is 36, and it represents the number of months after which the fund equals $0.

• It is 39, and it represents the number of months after which the fund equals $0.

• The temperature increased by 2 degrees Fahrenheit between 2:35pm and 2:53pm.

• In a period of 2 minutes, the temperature decreased from 53 degrees Fahrenheit to 35 degrees Fahrenheit.

• The temperature decreased by 2 degrees Fahrenheit between 2:35pm and 2:53pm.

• In a period of 2 minutes, the temperature increased from 35 degrees Fahrenheit to 53 degrees Fahrenheit.

• In a period of 2 minutes, the rate of water increased from 17 liters per minute to 5 liters per minute.

• The flow rate of water increased by 2 liters per minute between 3:05pm and 3:17pm.

• In a period of 2 minutes, the rate of water decreased from 17 liters per minute to 5 liters per minute.

• The flow rate of water decreased by 2 liters per minute between 3:05pm and 3:17pm.