Characteristics of Parabolas

What are the zeros of the parabola? 

• 1, 5
• 3, -5 
• 3, 0
• -6, 1

How do you know if a parabola has a minimum?

• When ‘a’ is positive there is a minimum

• When ‘a’ is negative there is a minimum

• When all the numbers in the equation are negative there is a minimum

• When all the numbers in the equation are positive there is a minimum

What are the green dots called?

• axis of symmetry
• vertex
• parabola
• roots or x-intercepts

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

• domain changes

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

(also, factor this quadratic on your paper)

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

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

(also, factor this quadratic on your paper)

• (1,0)

• (-2,0)

• (0,1)

• (0, -1)

Find the y-intercept y = x² - 6x + 5

(also, factor this quadratic on your paper)

• (0, 8)

• (0, - 6)

• (5, 0)

• (0, 5)

What is the vertex of y = x² + 4x + 3 ?

(also, factor this quadratic on your paper)

• (2,1)
• (-2,1)
• (0,0)
• (-2,-1)

What is the green dashed line called?

• roots or x-intercepts
• parabola
• axis of symmetry
• y intercept