Quadratic Equations and Graphs

Quadratic equations take the shape of a _______ when graphed.

• parabola

• straight line

• snaked line

• elliptical

Determine the axis of symmetry of the parabola: y = 5x² - 20x + 13

• x=5

• x=-7

• x=2

• x=13

What is the domain of the graph?

• All real numbers

• To infinity and beyond

• y ≥ 0

• x ≥ 0

What is the range of the graph?

• All real numbers

• To infinity and beyond

• y ≥ 0

• x ≥ 0

What is the domain and the range for the graph?

• Domain : -2 ≤ x ≤ 2
  Range : 0 ≤ y ≤ 4

• Domain : 0 ≤ x ≤ 4
  Range : -2 ≤ y ≤ 2

• Domain : All real #s
  Range : y ≤ 4

• Domain : -2 ≤ x ≤ 2
  Range : y ≤ 4

Which answer choice describes  y = -3x² +7x - 2 accurately?

• opens up with a maximum

• opens up with a minimum

• opens down with a maximum

• opens down with a minimum 

What is the axis of symmetry?

• x=-1

• x=-2

• y=-1

• y=3

Does this parabola have a maximum or minimum?

• Maximum

• Minimum

Does y = -4x² have a maximum or minimum value?

• maximum since it will open downward

• minimum since it will open upward

• maximum since it will open upward

• minimum since it will open downward

What is the formula to find the vertex of a parabola?

• x = -b/2

• x = -b

• x = -b / (2a)

• x = -b / 2