Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient a of x2 should be positive or negative.
A. linear; positive
B. quadratic; positive
C. linear; negative
D. quadratic; negative
Answer: A
Mathematics
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Solve the problem.The position of a body moving on a coordinate line is given by 
with s in meters and t in seconds. When, if ever, during the interval 
does the body change direction?
A. At t = 6 sec B. At t = 3 sec C. At t = 12 sec D. No change in direction
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Sketch a line passing through the point and having slope m.(0, 5), m = - 
A. 
B. 
C. 
D. 
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Graph the function.f(t) = 3 cos (t) 
A. 
B. 
C. 
D. 
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Determine the zeros (if any) of the rational function 
.
A. 
B. x = -4
C. 
D. x = -5, x = 5
E. no zeros
Mathematics