Introduction to Quadratics

What is the standard form of a quadratic equation?

• y = a + bx + cx^2

• y = ax + bx^2 + c

• y = ax^2 + bx + c

• y = ax^2 + bx - c

What shape does a graph of a quadratic equation form?

• Circle

• Triangle

• U-shaped curve

• Straight line

If 'a' is positive in a quadratic equation, in which direction does the parabola open?

• Upwards

• Downwards

• Sideways

• Does not open

How is the vertex of the parabola defined?

• The highest or lowest point on the graph

• The intersection of two lines

• The point where the graph crosses the x-axis

• The point where the graph crosses the y-axis

What is the formula for the axis of symmetry in a quadratic equation?

• x = -b / 2a

• x = b / 2a

• x = -b / a

• x = b / a