Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point.f(x) = -x2 + 2x - 1
A. minimum; 
B. maximum; 
C. minimum; 
D. maximum; 
Answer: D
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Find the standard equation of a parabola with the given focus or directrix. Assume that the vertex is at the origin.Focus (-4, 0)
A. y2 = -4x B. x2 = -16y C. y = -16x2 D. y2 = -16x
Solve the problem.Using a phone card to make a long distance call costs a flat fee of $0.39 plus $0.32 per minute starting with the first minute. Find a linear function f(x) = mx + b whose input is the number of minutes for a call and whose output is the corresponding cost for the call.
A. f(x) = 0.39x B. f(x) = 0.32x C. f(x) = 0.39x + 0.32 D. f(x) = 0.32x + 0.39
Solve the problem.Only one of the following equations is set up so that the values of a, b, and c can be determined immediately. Which one is it?
A. (3x + 5)(x + 1) = 0 B. (3x + 5)2 = 1 C. 3x2 + 5x + 1 = 0 D. x2 + x = 1
Provide an appropriate response.Find y' if y = (2x + 3)3x - 4
What will be an ideal response?