Quadratic Function Understanding

Which equation would give the graph of a parabola?

• y = 2x - 3

• y = x₂ + 1

• y = x² + 4

If red represents y = x², which equation represents black?

• y = 7x²

• y = -7x²

• y = -(1/7)x²

• y = -5x²

• F
• G
• H
• J

What is the maximum/minimum of a parabola called?

• vertex

• point

• top

• bottom

What is the green dashed line called?

• roots or x-intercepts

• parabola

• axis of symmetry

• line of dashes

A parabola has a vertex at (-3,2).
Where is the axis of symmetry?

• y = -2

• x = 3

• x = -3

• y = 2

How can you tell whether a parabola is facing up or facing down by looking at the equation?

• The vertex tells you the direction of the opening

• The value of "a" tells you the direction of the opening.

• All parabolas open upward

• All parabolas open downward

Compare the function y = 0.3x² to the parent function y = x²

• Wider

• Narrower

Compare the function y = 5x² to the parent function y = x²

• Wider

• Narrower

Match the equation to its description.

• Reflected over x and stretched by 3

• Stretched by 3

• Reflected over x

• Reflected over x and up 3