Chapter 8 Unit TEST: Graphing Quadratic Equations Answers
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Which function in vertex form is equivalent to f(x) = x2 + x +1?
A
f(x) = +
B
f(x) = +C
f(x) = +
D
f(x) = +22
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What is the vertex of the graph of the function f(x) = x2 + 8x − 2 ?
A
(−4, 18)B
(0, -2)C
(-8, -2)D
(−4, −18)23
On a coordinate plane, a parabola opens up. It starts in quadrant 1, crosses the x axis where the vertex is in quadrant 4, and crosses the x-axis back into quadrant 1.
A
f(x) = (x – 8)2 + 6B
f(x) = (x + 8)2 + 6C
f(x) = (x + 8)2 – 6D
f(x) = (x – 8)2 – 624
The function f(x) = –(x – 3)2 + 9 can be used to represent the area of a rectangle with a perimeter of 12 units, as a function of the length of the rectangle, x. What is the maximum area of the rectangle?
A
3 square unitsB
6 square unitsC
9 square unitsD
12 square units25
The function f(x) = −(x + 5)(x + 1) is shown.
A
all real numbers less than or equal to 4B
all real numbers less than or equal to −3C
all real numbers greater than or equal to 4D
all real numbers greater than or equal to −3Did you find these answers helpful?
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