Parts of the Parabolas

When a parabola opens downward the vertex is

• a minimum

• a maximum

• a vertex

• a parabola

Define X-intercept

• The highest or lowest point on the graph

• Where the parabola touches or intersects the x-axis

• Where the parabola touches or intersects the y-axis

• A line that divides the graph into two equal parts. i.e. cuts the graph in half

Tags

CCSS.HSF-IF.C.7A

Define Y-intercept

• Where the parabola touches or intersects the x-axis, also called the x-intercept

• The lowest y-value on the graph

• The highest y-value on the graph

• Where the parabola touches or intersects the y-axis

Tags

CCSS.HSF-IF.C.7A

What is the significance of the ordered pair (2, -4) to the graph?

• It is the vertex

• It is an x-intercept

• It is the y-intercept

• It is the axis of symmetry

Tags

CCSS.HSF-IF.C.7A

What is the vertex of
y = x² + 4x + 3 ?
(hint: graph it)

• (2, 1)

• (-2, 1)

• (0, 0)

• (-2, -1)

What is the axis of symmetry of

y = 2x² - 4x + 9 ?

• x = 1

• x = -1

• x = -2

• (1, 7)

A parabola has a vertex at (5, -3).

Where is the axis of symmetry?

• y = -3

• x = -3

• x = 5

• (5, -3)

What is the vertex of this parabola?

• (−1, 3)

• (−3, 11)

• (−2, 5)

• (0, 5)

What do we call the graph of a quadratic function?

• parabola

• linear

• cubic

• sinusoidal

Tags

CCSS.HSF-IF.C.7A

What's the maximum/minimum?

• Minimum: (-3, -4)

• Minimum: (-4, -3)

• Maximum: (-3, -4)