Parabolas and Vertex Form

If the a value is positive in the equation of y = ax² + c, which direction does the graph open?

• up

• down

• left

• right

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

• up

• down

• left

• right

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

• a

• b

• c

Tags

CCSS.HSF-IF.C.7A

What is the equation of this graph?

• y = x² + 1

• y = - x² + 1

• y = x²

• y = - x²

Tags

CCSS.HSF-IF.C.7A

What is the equation of the following graph?

• y = 2x²

• y = x² + 2

• y = x² - 2

• y = - 2x²

Tags

CCSS.HSF-IF.C.7A

What is the equation of this graph?

• y = - x²

• y = - x² - 3

• y = - x² + 3

• y = x² + 3

Tags

CCSS.HSF-IF.C.7A

Which way is the graph of

 $y=x^2-8$  shifted in comparison to  $y=x^2$  

• left 8

• right 8

• up 8

• down 8

Which way is the graph of

 $y=\left(x-8\right)^2$  shifted in comparison to  $y=x^2$  

• left 8

• right 8

• up 8

• down 8

What is the vertex of the parabola?

• (2,4)

• (-2,-4)

• (4,2)

• (-4,-2)

What is the vertex of this parabola?

• (−1, 3)
• (−3, 11)
• (−2, 5)
• (0, 5)