IA #2 Elaboration

The table below shows, T, the cost for purchasing G gallons of gasoline. Which of the following equations represents this situation?

• T = G + 1.50

• T = 1.50 x G

• T = 1.50/G

• T = 1.50 - G

The graph shown represents the distance the Harrison family drove on their vacation. What does the unit rate represent?

• the distance the family drove

• the number of hours the family drove

• the speed of the car

• the number of stops the family made on the trip

The table shows the relationship between the potential number of hours that Michael would work and his potential earnings, prior to taxes, that Michael could earn this weekend at the water park.Which graph represents this relationship and shows the amount of money Michael will be paid per hour?

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Which of the functions represents a function?

• {(-1, 2), (0, 3), (1, 4), (2, 5), (3, 6)}

• {(1, 2), (1, 3), (1, 4), (1, 5), (1, 6)}

• {(0, 1), (0, 2), (0, 3), (0, 4), (0, 5)}

• {(-2, 2), (-1, 2), (0, 2), (-1, 2), (-2, 2)}

Stephanie planned to save $150 of her baby-sitting earnings. The scatterplot below shows the amounts in her savings account in the weeks after she opened the account. If she continues to withdraw money as shown in the scatterplot, by week 7 how much money would you predict she will have left in her account?

• $50

• $15

• $5

• $0

Jonas made a scatterplot of the number of miles he rode his bicycle yesterday. If he had continued on the bike for 9 hours, how many miles would he have traveled?

Melissa collected data at the grocery store. She recorded how many people were in line in front of her and how long she had to wait in line. The graph below shows her data from several visits to the grocery store.Melissa went to the grocery store again yesterday. When she went to pay for her items, there were 6 people in front of her. Based on this scatterplot, how long would she most likely wait in line?

• 14 minutes

• 12 minutes

• 8.5 minutes

• 3 minutes

Which representation shows y as a function of x?

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• {(–2, –1), (–1, 0), (0, 1), (1, 2), (2, 3), (2, 4)}

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Melissa is saving $25 that she earned for washing her mom’s car. She earns $10 every week for doing chores, which she also saves. Which function can be used to find t, the amount of money Melissa will have saved at the end of n weeks of doing chores?

• t = 10n + 25

• t = 25n + 10

• t = 35n

• t = 15n

What is the equation that is represented by the values in the table below?