Multiple Representations

The graph represents the linear relationship between the number of books Layla has read and the number of months she has been a member of a book club. (7.4A)

• Layla has read 2 books in the first 3 months she was a member of the book club.

• Layla has read 3 books in the first 2 months she was a member of the book club.

• Layla has read 3 books in the first 4 months she was a member of the book club.

• Layla has read 4 books in the first 3 months she was a member of the book club.

A dolphin travels through the water of a speed of 25 kilometers per hour. Which representation shows the distance a dolphin can travel at this rate? (7.4A)

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Cheddar cheese costs $4.25 per pound. Which equation best represents y, the total cost of x pounds of cheddar cheese?

• x = 4.25 + y

• x = 4.25y

• y = 4.25 + x

• y = 4.25x

Frank and his family drove 6 hours every day during a road trip. Which graph best represents y, the total number of hours driver in x days?

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A fish is swimming at a constant rate toward the ocean floor. The equation y = -7x -3 can be used to represent this situation, where y is the depth of the fish in meters below sea level and x is the number of seconds the fish has been swimming.

Which statement best describes the depth of this fish, given this equation? (7.7A)

• From a starting position of 7 meters below sea level, the fish is descending 3 meters per second

• From a starting position of 7 meters below sea level, the fish is ascending 3 meters per second

• From a starting position of 3 meters below sea level, the fish is descending 7 meters per second

• From a starting position of 3 meters below sea level, the fish is ascending 7 meters per second

The table shows the relationship between y, the cost to rent a boat, and x, the amount of time the boat is rented. Which graph best represents the relationship between x and y shown in the table? (7.7A)

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Which equation best represents the relationship between x and y in the graph? (7.7A)

• y = 2x + 4

• y = 2x - 2

• y = 1/2x + 4

• y = 1/2x - 4

Which table contains only values that satisfy the equation

y = 0.5x + 14?

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A store sells new video games for $55 each. Used video games sell for $12 each. Jacob is buying 3 new video games and x used video games. Which equation can be used to find y, the total price Jacob must pay in dollars? (7.4A)

• y = 12x + 55

• y = 12x + 165

• y = 55x + 12

• y = 165x + 12