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

Tags

CCSS.7.EE.B.4A

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

Tags

CCSS.HSF-LE.A.1B

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?

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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?

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

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.

Tags

CCSS.HSF.LE.B.5

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.

Tags

CCSS.HSF.LE.B.5

Michelle and her family decide to rent bicycles during their summer vacation. They find a store that has a sign listing rental rates for one bicycle.

| Hours | Cost (dollars) |

| 1 | 80 |

| 2 | 100 |

| 3 | 120 |

| 4 | 140 |

Which statement correctly explains how the rental cost of a bicycle may be calculated?

• The initial cost for renting a bicycle is $60, with each hour of use costing an additional $30.

• The initial cost for renting a bicycle is $60, with each hour of use costing an additional $20.

• The initial cost for renting a bicycle is $30, with each hour of use costing an additional $20.

• The initial cost for renting a bicycle is $50, with each hour of use costing an additional $30.

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

David rents a power drill to repair his fence. The drill rents for a flat rate of $50.00 and $20.00 per hour from the time it is checked out to when it is checked back in. The costs for renting the power drill for 1, 2, 3, and 4 hours (and beyond) are shown in the sequence.

$70.00, $90.00, $110.00, $130.00, …

Which function models this sequence of costs, c(h), where h is hours?

• c(h) = 30h + 50

• c(h) = 30h + 10

• c(h) = 50 + 20h

• c(h) = 20 + 50h

Tags

CCSS.HSF-BF.A.1A