Finding the Vertex Using Desmos

Identify the vertex

• (-1,-9)

• (0,-8)

• (-4,0)

• (0,0)

Where is the axis of symmetry for this parabola?

• x = −1

• x = 0

• y = 3

• x = −3

Using Desmos, graph y = 2x² + 4x - 3 and identify the max or min.

• Max: (-1, -5)

• Min: (-1, -5)

• Max: (-5, -1)

• Min: (-5, -1)

Tags

CCSS.HSF-IF.C.7A

Using Desmos, graph y = -3x² + 6x - 5 and identify the max or min.

• Max: (1, -2)

• Min: (1, -2)

• Max: (-2, 1)

• Min: (-2, 1)

What is the vertex of this function?

a

b

c

d

Zero(-)

Vertex

Zero (+)

Y-intercept

The axis of symmetry for the function 2x²+8x+2 is x=-2. What is the vertex?

• (-2, -6)

• (-6, -2)

• (2, 6)

• (6, 2)

A half-pipe at a skate park is approxiamtely parabolic in shape.  It can be modeled by the quadratic function y = x² - 6x + 9.  At what point would a skater be at the lowest part of the ramp? 

• (-3, 36)

• (36, -3)

• (3, 0)

• (0, 3)

What is the vertex of y=(x + 2)² - 1?

• (2,1)

• (-2,1)

• (0,0)

• (-2,-1)

The table of a quadratic function is shown.

Create the ordered pair that represents the vertex of the quadratic.

( ​ (a)   , ​ (b)   )

• -2

• -6

• -3

• -5

• -4

• -1

• 0

• 1

• 3

( ​ (a)   , ​ (b)   ​ )

• 9

• 0

• 3

• -9

• -3