UNIT 5&6

Which description is best represented by the equation shown below?

y = 7.5x - 3

• Melissa ran 7 and a half miles in 3 hours. How many miles did Melissa run per hour?

• Jesse paid $7.50 an hour to skate for 3 hours. What was Jesse's total cost?

• Katie earns $3 an hour walking Mrs. Mitchell's dog. She walks the dog 7 and a half hours each week. How much did Katie earn last week?

• Betty spent $3 on art supplies. She sell paintings for $7.50 each. What is Betty's profit?

Tickets are on sale for a basketball game at the Alamodome in San Antonio, Texas. Each ticket sells for $74.50. Bus shuttle prices to the event cost $15 per family. Which equation can be used to determine t, the total cost to attend the game if n tickets are purchased by the Loza family?

• n = 74.50t + 15

• t = 15n + 74.50

• t = 74.50n + 15

• t = 74.50 + 15n

A table is shown above. Which equation identifies the relationship in the table?

• y = 2x - 5

• y = -2x + 5

• y = 2x + 5

• y = -2x - 5

Ryan builds 4 picnic tables each day. He started the week with 2 tables. Which equation best represents t, the total number of tables he will have after d days?

• t = 4d + 2

• t = 2d + 4

• d = 4t + 2

• t = 2d + 2d

Timothy created this graph during his math class. Which equation did Timothy use to create the graph?

• y = 3x + 5

• y = 3x - 5

• y = -3x + 5

• y = -1/3x + 5

y = -50x + 750

Which of the following does NOT match the equation shown above?

• A swimming pool had 750 gallons of water in it tat the beginning of the day. The water is being dreained at a constant rate of 50 gallons per hour.

• Coach Story saved $50 a month until he had a total of $750 in his account.

• A skier ascended 750 feet up a mountain slope, and then skied down the slope of the mountain at a rate of 50 meters per minute.

• A charged cell phone has 750 volts of power. Each hour, approximately 50 volts of power are used by the owner.

Which of the following equations best represent the graph above?

• y = -0.5x + 10

• y = 10x - 2

• y = -2x + 10

• y = 2x + 10

A submarine started the day at sea level and then descended at a rate of 1,200 feet per hour. The equation -1200x can be used to determine the depth of the submarine. Which of the following tables contains a set of values that correspond to the equation?

• 
• 
• 
• 

A restaurant uses cartons of eggs every morning. The number of cartons used is shown above.

Based on the display, which of the following best describes the rate of egg use?

• The restaurant uses 12 eggs per hour.

• The restaurant uses 6 eggs per hour.

• The restaurant uses 1 egg per hour.

• The restaurant uses 18 eggs per hour.

A copy machine can make 250 copies in 4 minutes. Represent the constant rate of change in copies per minute.

• 125 copies per minute

• 62.5 copies per minute

• 50.5 copies per minute

• 4.2 copies per minute