Solve.The average value of a certain type of automobile was $13,380 in 1995 and depreciated to $5820 in 1998. Let y be the average value of the automobile in the year x, where x = 0 represents 1995. Write a linear equation that models the value of the automobile in terms of the year x.
A. y = -2520x + 5820
B. y = - 
x - 5820
C. y = -2520x + 13,380
D. y = -2520x - 1740
Answer: C
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Solve the problem.The odds against Muffy beating her friend in a round of golf are 1 : 6. Find the probability that Muffy will lose.
A. 
B. 
C. 
D. 
Match the equation to its graph.y = 4x + 6
A. 
B. 
C. 
D. 
Solve.The velocity v of a falling object (ignoring air resistance) is directly proportional to the time t of the fall. If, after 4 seconds, the velocity is 128 feet per second, what will its velocity be after 9 seconds?
A. 
foot/second
B. 288 feet/second
C. 133 feet/second
D. 285 feet/second
Solve the problem.The price p and the quantity x sold of a certain product obey the demand equation p = - 
x + 140, 0 ? x ? 1120.What price should the company charge to maximize revenue?
A. $84 B. $70 C. $105 D. $35