Constant Rate Equations

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

• 40 CALORIES PER MIN.
• 15 CALORIES PER MIN.
• 4 CALORIES PER MIN.
• 60 CALORIES PER MIN.

Determine the Constant Rate of Change?

• -10 ft per second
• 15 ft per second
• 10 ft per second 
• -15 ft per second

Determine the Constant Rate of Change?

• $250.00 per day
• $333.33 per day
• -$250.00 per day
• -$333.33 per day

Find the rate of change

• 1
• 2
• 11
• Not a constant slope/Non-Linear

• x = 4.25 + y

• x = 4.25y

• y = 4.25 + x

• y = 4.25x

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