1.8 Interpreting Graphs of Functions

Arcadia Inc. manufactures videogames. This is a graph showing the profit, in thousands of dollars, made by the company over the first six months of the year. Which statement about the company's profits is incorrect?

• The profits increased from January to February.
• The largest profit for the six-month period was $275,000.
• The profit decreased from April to June.
• The smallest profit for the six-month period was $150,000.

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Interpret the y-intercept of the graph.

• All those polled used a social networking site 8 months after February 2005.

• About 8% of those polled used a social networking site in February 2005.

• No one used a social networking site in February 2005.

• There were 8 social networking sites in February 2005.

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Identify the independent and dependent variables.

• game; score

• score; game

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Identify the independent and dependent variables.

• time; temperature

• temperature; time

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CCSS.6.EE.C.9

What is the tortoise's constant speed (average rate of change)?

• 60 feet/ 3 minutes
• 40 feet/minute
• 60 feet/minute
• 40 feet/ 3 minutes

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CCSS.8.F.B.4

CCSS.HSF.IF.B.6

Choose the best situation for the graph.

• A car is moving at a constant speed for several minutes. When it approaches a red light, it slows down and comes to a stop.
• A plant grows steadily and then has a growth spurt during the rainy season. It remains the same height for a while and then grows steadily again.
• A family buys a fish tank and some fish. After two weeks, they buy some more fish. After two more weeks, they buy even more fish.
•  A monkey swings from a high branch to a lower branch. He climbs along the branch. Then he jumps to a higher branch and takes a nap.

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CCSS.HSF.IF.B.4

What is happening at D?

• Stationary
• Accelerating
• Fast steady speed; moving away from the starting position
• Slower steady speed; moving away from the starting position

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CCSS.HSF.IF.B.4

 Every morning, Tom walks along a straight road from his home to the bus stop. Below, is a graph representing Tom’s trip to school.
- What is the distance covered through the second segment, which is between 50 seconds, and 70 seconds?

• 40 meters
• 60 meters
• 80 meters
• 20 meters

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CCSS.HSF.IF.B.4

Describe the situation.

• Sales decrease quickly at a constant rate, and then increase slowly at a constant rate.
• Sales stay constant, then decrease at a constant rate, and increase slowly.  

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CCSS.HSF.IF.B.4

At what distance does the motorcycle pass the car?

• 10 m.

• 30 m.

• 50 m.

• 70 m.

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