Provide an appropriate response.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 2000
A. Quadratic; negative
B. Quadratic; positive
C. Linear; negative
D. Linear; positive
Answer: B
Mathematics
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A. 
B. 
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D. 
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A. 
+ 
B. 
- 
C. 
- 
D. 
- 
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Perform the following operation and write the result in lowest terms. 20
- 5
A. 15
B. 14
C. 10
D. 15
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Use even and odd properties of the trigonometric functions to find the exact value of the expression.cos (-150°)
A. 
B. 
C. - 
D. - 
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