Parts of Quadratic Function Graphs and Equations

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

Define Vertex

• Where the parabola touches or intersects the x-axis

• The highest or lowest point on the graph

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

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

Identify the y-intercept

• (0, -3)

• (3, 0)

• (0, 3)

• (2, 1)

Does this graph have maximum or minimum value?

• maxima

• minima

• neither

• both

Define Axis Of Symmetry

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

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

• The highest y-value on the graph

• The highest or lowest point on the graph

Which function has an axis of symmetry of x = 0?

• 
• 
• 
• None of the above

If the vertex of a parabola is (2, −3), what is the axis of symmetry?

Label the following parts of a quadratic function.

a

b

c

d

greater solution

y-intercept

lesser solution

Vertex

What is the domain of the part of the function shown?

• All real numbers

What is the range of the part of the function shown?

• All real numbers