Quadratics Quiz 4.1-4.3

Which best describes the vertex of a parabola?

• Any point on the parabola.

• A point on the x-axis.

• The highest or lowest point of a parabola

• A point on the y-axis.

Given an equation in standard y=ax²+bx+c form, how do you find the vertex?

• Factor using the box method.

• The vertex is the 'c' value.

• Use the formula x=-b/2a to find x and substitute that number in the equation to find y.

• Graph the equation and use 2nd TRACE on the calculator to find the zeros.

Find the Vertex:

y = x² + 6x + 2

• (-3,-7)

• (1,6)

• (-3, -25)

• (-3, 2)

Does this graph have a maximum or minimum?

• Minimum

• Maximum

The axis of symmetry is a vertical line that goes through the...

• y-intercept

• any random point

• vertex

• x-axis or y-axis

A parabola has a vertex at (-3,2).
Where is the axis of symmetry?

• y = -2

• x = 3

• x = -3

• y = 2

Which value in y=ax²+bx+c determines if a parabola opens up or down?

• a

• b

• c

Does the parabola y = -3x² - 6x + 3 open up or down?

• up

• down

Does the parabola y = 4x² - 20x - 10 have a max or a min?

• max

• min

Which value in y=ax²+bx+c represents the y-intercept?

• a

• b

• c