Roots of Quadratic Functions

The equation y = x² + 3x - 18 is graphed.  Based on this graph, what are the roots (x-intercepts) of the equation x² + 3x - 18 = 0?

• -3 and 6
• 0 and -18
• 3 and -6
• 3 and -18

How many roots does this parabola have? 

• 3
• 2
• 0
• 1

The equation y = x²  is graphed.  Based on this graph, what are the roots of the equation x²  = 0?

• 0
• -1 and 1
• 2 and 0
• y

How many solutions (roots) does this graph have?

• one
• two
• no solutions
• cannot be determined

What are the roots of the function
f(x)= (x - 2)(x + 3)?

• x = - 2 or x = 3
• x = 2 or x = -3
• The are no real roots
• x = 2 or x = 3

Which equation below is a quadratic?

• y=9x+5
• y=3x²-6
• y=5x³+6
• x=3^x

What is the range of this function?

• (- ∞,+∞)
• [0, +∞)
• [-2, +∞)
• [2, +∞)

Which graph has the x intercepts of -2 and 1?

• y = 2x -1
• y = x²-2x +1
• y = x²+x-2
• y=x²-x-2

What are the x-interepts for the graph of the function:  y = x² - 3x - 10 

• -5, 2
• -5, -2
• 5, -2
• 5, 2

What are the zeros of the quadratic function?
y = x² - 2x - 15

• x = -2
  x = -15
• x = -3
  x = 5
• x = 3
  x = -5
• x = 1
  x = -16