Find the focus and directrix of the parabola with the given equation.y2 = -12x
A. focus: (0, -3)
directrix: y = 3
B. focus: (-3, 0)
directrix: y = 3
C. focus: (3, 0)
directrix: x = -3
D. focus: (-3, 0)
directrix: x = 3
Answer: D
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Determine an appropriate viewing window for the given function and use it to display its graph.f(x) = 
A. 
B. 
C. 
D. 
Determine whether the sequence is arithmetic. If the sequence is arithmetic, determine the first term a and common difference d.1, 4, 7, 10, 13, . . .
A. Arithmetic; a = 1, d = 3 B. Not arithmetic
Is the following correspondence a function??
A. Yes B. No
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00