Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient 
of x2 should be positive or negative. DENTAL FLOSS USE 
Years since 1990
A. Linear; positive
B. Linear; negative
C. Quadratic; positive
D. Quadratic; negative
Answer: D
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Find the area of the circle. Use 3.14 for ?. Round results to two decimal places in necessary
A. 706.5 ft2 B. 188.4 ft2 C. 2826 ft2 D. 94.2 ft2
Determine the specific solutions (if any) to the equation on the interval [0, 2?).2 sin2 ? = sin ?
A. 
, 
, 
, 
B. 
, 
C. 
, 
D. 0, ?, 
, 
Use elimination to solve each system of equations, if possible. Identify the system as consistent or inconsistent. If the system is consistent, state whether the equations are dependent or independent. 8x + 7y = -13x + 3y = -3
A. (6, -6); consistent and independent B. (5, -6); consistent and independent C. (6, -7); consistent and independent D. inconsistent
Use technology to calculate det A.A = 
A. -36 B. 36 C. 76 D. -46