Quadratic Function by Using Standard Form

This is the standard form of a quadratic function:

y = ax² + bx + c

• True

• False

Identify the "a" value: y = 3x² + 4x - 5

• 3

• 4

• 5

• -5

Identify the "b" value: y = 3x² + 4x - 5

• 3

• 4

• 5

• -5

Identify the "c" value: y = 3x² + 4x - 5

• 3

• 4

• 5

• -5

Identify the "a" value: f ( x ) = -10x² + 8x + 7

• 10

• -10

• 8

• 7

Identify the "b" value: f ( x ) = -10x² + 8x + 7

• 10

• -10

• 8

• 7

What is the y-intercept of this quadratic function:

y = -10x² + 8x + 7

• 10

• -10

• 8

• 7

Identify the y-intercept of: f ( x ) = -12x² - x - 9

• -12

• -1

• 0

• -9

Does this parabola open up or down? y = -12x² - x - 9

• up

• down

What is the y-intercept: y = 3x + 5 -2x² *make sure it is in standard form!

• -2

• 3

• 0

• 5