Analyzing Parabolas

If the a value is negative in the equation y = ax² + c , which direction does the parabola open?

• up

• down

• left

• right

What is the equation of this graph?

• y = x² + 1

• y = - x² + 1

• y = x²

• y = - x²

The equation of the parabola is:

• y = x + 2

• y = x² + 2

• y = x - 2

• y = x² - 2

What is the equation of this graph?

• y = - x²

• y = - x² - 3

• y = - x² + 3

• y = x² + 3

Which graph is a parabola?

• 
• 
• 
• 

Is the following parabola concave up or concave down?

• Concave down

• Concave up

• Neither

Which letter in a equations y = ax² + c represents the y-intercept?

• a

• b

• c

What is the y-intercept of the parabola y = 5x² - 3

• 5

• 3

• - 3

• -5

What is the y-intercept of the parabola?

• -4

• 4

• -3

• 0

What is the equation of the following graph?

• y = 2x²

• y = x² + 2

• y = x² - 2

• y = - 2x²