Find an equation for the parabola described.Vertex at (-4, -2); directrix y = -5
A. y = 
t2 - 2, x = t - 4
B. x = 
t2 - 4, y = t - 2
C. y = 
t2 - 4, x = t - 2
D. y = 
t2 + 2, x = t + 4
Answer: A
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Graph the function.f(x) = 
A. 
B. 
C. 
D. 
The average speed of a vehicle on a stretch of Route 134 between 6 a.m. and 9 a.m. on a typical weekday is approximated by the function
?
?
where 
is measured in miles per hour and 
is measured in hours, with 
corresponding to 6 a.m. Find the interval where 
is decreasing and the interval where 
is increasing.
?
A. 
is increasing on 
is decreasing on 
B.
is increasing on is decreasing on 
C.
is increasing on 
is decreasing on 
D.
is increasing on 
is decreasing on
E.
is increasing on 
is decreasing on
Restrict the domain of the function f so that the function is one-to-one and has an inverse function. Then find the inverse function f-1. State the domains and ranges of f and f-1. ? f(x) = |x - 9| + 1 ?
A. f-1(x) =x+ 8The domain of f and the range of f-1 are all real numbers x such that x ? 9.The domain of f-1 and the range of f are all real numbers x such that x ? 1. B. f-1(x) = x - 8The domain of f and the range of f-1 are all real numbers x such that x ? 9.The domain of f-1 and the range of f are all real numbers x such that x ? 1. C. f-1(x) = -x - 8The domain of f and the range of f-1 are all real numbers x such that x ? 1.The domain of f-1 and the range of f are all real numbers x such that x ? -9. D. f-1(x) = x + 8The domain of f and the range of f-1 are all real numbers x such that x ? -9.The domain of f-1 and the range of f are all real numbers x such that x ? 1. E. f-1(x) = -x + 8The domain of f and the range of f-1 are all real numbers x such that x ? 1.The domain of f-1 and the range of f are all real numbers x such that x ? 9.
Evaluate the expression for the given value or values.y ÷ y for y = 8
A. 1 B. -1 C. 8 D. 0