Linear Functions Answers

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Select all of the following that are quadratic functions.

x = 3y2 – 6y + 5

y + 3 = –2 x 2+ 5

y = 2 x 2 – 8 x + 6

y= –7 x – 4

y – 3 x = 4 x 3 – x2 + 9

y = 5 x(x + 9) – 8

y – 2 x 2 = 3 x – 2 x 2 + 4

y = –3x2 – 12Axis of symmetry:

= 12

y = –12

y= –3

x = 0

Axis of symmetry:

= –2

= –1

x = 1

= 2

The vertex is at a

minimum

maximum

y = ax2 + cAxis of symmetry:

y = 0

y = –c

x = 0

x = a

The axis of symmetry is

x = –1

x = 0

x = ½

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