Decide whether each situation sounds like it would be better modeled by a linear or quadratic function, and circle your answer.
1 A ball is dropped from the top of the Empire State Building, and it keeps dropping faster and faster. How far has the ball dropped after 𝑥 seconds?
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2 A car is 50 miles away, traveling at 65mph. How far away is the car after each hour?
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3 The data plan for a cell phone bill costs $5/gb, plus $15/mo. How much is the bill for a given month, after 𝑥 number of gigabytes?
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4 A ball is dropped from the top of the Empire State Building, and it keeps dropping faster and faster. How fast is the ball moving after 𝑥 seconds?
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5 A cannonball is fired from the deck of the S.S. Parabola, and arcs through the sky before hitting its target, 17 miles away.
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6 The area of a circle, as its radius increases.
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7 The circumference of a circle, as its radius increases.
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These materials were developed partly through support of the National Science Foundation, (awards 1042210, 1535276, 1648684, 1738598, 2031479, and 1501927). 
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