Box 2A - Finding Vertex

Standard form of a quadratic equation

• y=x²
• y=ax²+bx+c
• y=mx+b
• y=x

The formula x = -b/2a is used to find

• the roots
• the x-value of the vertex
• the y-intercept
• the axis of symmetry

What is the vertex of the quadratic function:
y = x² - 6x + 11?

• (3,2)
• (-3,-2)
• (-3,2)
• (3,-2)

Does the equation Up or or down?

Y = -3x² +7x - 2

• up

• down

Tags

CCSS.HSF-IF.C.7A

When a parabola opens downward the vertex is

• a minimum
• a maximum
• a vertex
• a parabola

Determine the values of
a, b, and c for
the quadratic equation: 
4x² – 8x = 3

• a = 4, b = -8, c = 3
• a = 4, b =-8, c =-3
• a = 4, b = 8, c = 3
• a = 4, b = 8, c = -3

What's the vertex of the following quadratic function?
x² - 8x + 18

• (-2, 4)
• (4, 2)
• (2, 4)
• (4, -2)

What's the vertex of the following quadratic function?
2x² - 8x + 11

• (-2, 3)
• (3, 2)
• (2, 3)
• (3, -2)

What's the vertex of the following quadratic function?
3x² - 18x + 30

• (-3, 3)
• (3, -3)
• (-3, -3)
• (3, 3)

If given the equation
y = 3(x + 5)² - 4,
what is the vertex of the parabola?

• (5, -4)
• (-5, -4)
• (-15, -4)
• (15, -4)