Quadratic Functions: Standard Form Answers
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The axis of symmetry for the function f(x) = −x2 − 10x + 16 is x = −5. What are the coordinates of the vertex of the graph?
A
(−5, 41)B
(−5, 56)C
(−5, 76)D
(−5, 91)2
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The a value of a function in the form f(x) = ax2 + bx + c is negative. Which statement must be true?
A
The vertex is a maximum.B
The y-intercept is negative.C
The x-intercepts are negative.D
The axis of symmetry is to the left of zero.3
On a coordinate plane, a parabola opens down. It goes through (negative 2, negative 2), has a vertex at (1.5, 10), and goes through (5, negative 2).
A
(–∞, 1.5)B
(–∞, 10.25)C
(1.5, ∞)D
(10.25, ∞)4
The axis of symmetry for the graph of the function is x=6. What is the value of b?
A
−12B
−3C
Option
D
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