Provide an appropriate response.The equation of a circle can be written in the form x2 + y2 = r2. Is this a function? Why or why not?
What will be an ideal response?
It is not a function because for y ? 0, there are two y-values corresponding to each x-value. It fails the vertical line test.
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Solve the problem.A car wheel has a 16-inch radius. Through what angle (to the nearest tenth of a degree) does the wheel turn when the car rolls forward 5 ft?
A. 219.9° B. 214.9° C. 224.9° D. 229.9°
Solve the problem.Sales of CD players in a particular U.S. market are shown in the given table for various years. Let s be the sales of CD players (in thousands) for the year that is t years since 1990. A quadratic model for the sales is 
According to the model, how many CD players were sold in 1997? Is this number an underestimate, an overestimate, or neither? CD Player Sales
A. 185 thousand; neither B. 275 thousand; overestimate C. 275 thousand; underestimate D. 200 thousand; overestimate
Multiply.
A. - 
x7
B. - 
x12
C. 
x7
D. 
x12
Translate the verbal model into an equation.The cost of dining out equals the cost of the meal plus $5 for parking.
A. c = m + 5 B. c = 5m C. c = m D. c + m = 5 E. c = 5