Graphing quadratic Functions

Which is the vertex of y = x²+ 16x + 71 ?

• V(-8, 7)

• V(-8, 3)

• V(8, 10)

• V(16, -2)

Find the y-intercept y = x² - 6x + 5

• (0, 8)

• (0, - 6)

• (5, 0)

• (0, 5)

Find the y-intercept of f(x) = 2x² - 2x + 1

• (1,0)

• (-2,0)

• (0,1)

• (0, -1)

Does the equation open up or down? 
Y = -3x² +7x - 2

• up
• down
• Neither; it opens to the right.
• Neither; it opens to the left.

What is the maximum/minimum of a parabola called?

• vertex
• point
• top
• bottom

How can you tell whether a parabola opens up or opens 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

Find the axis of symmetry for the graph

• x = -1
• x = 1
• x = 3
• x = -1 , 3

Find the axis of symmetry for f(x) = x² + 4x - 5 

• x = 2
• x = -2
• x = 4
• x = -4

What is the vertex of y=x²+4x+3?

• (2,1)
• (-2,1)
• (0,0)
• (-2,-1)

Which of the following functions graphs the parabola shown?

• y = x² - 4x + 1
• y = -2x² - 8x - 3
• y = x² - 4x + 5
• y = 2x² + 6x + 1