Quadratic Functions Answers

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Select all of the following that are quadratic functions.

A
x = 3y2 – 6y + 5
B
y + 3 = –2 x 2+ 5
C
y = 2 x 2 – 8 x + 6
D
y= –7 x – 4
E
y – 3 x = 4 x 3 – x2 + 9
F
y = 5 x(x + 9) – 8
G
y – 2 x 2 = 3 x – 2 x 2 + 4
3

a: b: c:

Answer:

17

4

Axis of symmetry:

A
= –2
B
= –1
C
x = 1
D
x = 2
6

Vertex: (, )

Answer:

20

7

The vertex is at a

A
minimum
B
maximum
8

a: b: c:

Answer:

-3

9

y = ax2 + cAxis of symmetry:

A
y = 0
B
y = –c
C
x = 0
D
x = a
12

units should be produced each day to yield a minimum cost.

Answer:

20 units should be produced each day to yield a minimum cost.

16

y = –3x2 – 12Axis of symmetry:

A
x = 12
B
y = –12
C
y= –3
D
x = 0
18

Vertex: (0, )

Answer:

-12

19

The axis of symmetry is

A
x = –1
B
x = 0
C
x = ½

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