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. Quadratic; positive
C. Linear; negative
D. Quadratic; negative
Answer: D
Mathematics
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Use a calculator to find the approximate value of the expression. Round the answer to two decimal places.cot 0.2038
A. 0.98 B. 0.21 C. 4.84 D. 1.02
Mathematics
Write the slope-intercept form of the equation for the line passing through the given pair of points.(2, 0) and (7, -4)
A. y = - 
x + 
B. y = - 
x - 
C. y = 
x + 
D. y = 
x - 
Mathematics
Solve the system in terms of the arbitrary variable listed.x; x + y - 2z = 83x + z = - 6
A. {(x, -7x - 4, -3x - 6)} B. {(x, 7x - 4, -3x - 6)} C. {(x, 7x + 4, -3x - 6)} D. {(x, -7x + 4, -3x - 6)}
Mathematics
Evaluate the integral 
.
?
A. 
B. 
C. 
D. 
E. 
Mathematics