Vertex Form Review

The coefficient "a" in vertex form controls what?
y=a(x-h)²+k

• Width and Opening Up or Down

• Width Only

• Vertical Shift

• Horizontal Shift

Which of the following parabolas is the widest?

• y=-0.5x²

• y=x²

• y=2x²

• y=-3x²

Which of the following parabolas is the narrowest?

• y=-0.5x²

• y=x²

• y=2x²

• y=-3x²

The coefficient "h" in vertex form controls what?
y=a(x-h)²+k

• Width and Opening Up or Down

• Width Only

• Vertical Shift

• Horizontal Shift

The coefficient "k" in vertex form controls what?
y=a(x-h)²+k

• Width and Opening Up or Down

• Width Only

• Vertical Shift

• Horizontal Shift

Which of the following parabolas is shifted UP the most?

• y=2(x-3)²+7

• y=2(x+3)²-7

• y=5(x-2)²+3

• y=5(x+2)²-3

Where is the vertex of the following equation:
y=3(x-2)²+5

• (2,5)

• (-2,5)

• (2,-5)

• (3,5)

What is the vertex of the following equation?

y=(x+3)²+2

• (-3,2)

• (-3,-2)

• (3,2)

• (3,-2)

Which of the following is concave DOWN?

• y=x²

• y=-x²

• y=(x-1)²

• y=x²-1

Where is the vertex of an equation in vertex form?
y=a(x-h)²+k

• (-h,k)

• (h,k)

• (k,h)

• (a,h)