Review: Key Features of Quadratic Functions

Review: Key Features of Quadratic Functions

Vertex

• Also the Max or Min

• Always write as an ordered pair (x,y)

• When asked to write the value of the Max or Min, write the y value of the vertex

Axis of Symmetry

• Vertical line that splits the function down the middle

• Write your answer as x = k; k is the x value of the vertex

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x - intercepts

• Also called zeros or roots

• There can be 2, 1, or no zeros

• Write your answer as an ordered pair (x,y); y value will always be 0

Domain & Range

• The domain will always always always always be (-inf, inf)

• Range is the lowest point to the highest point (one of those points will always be infinity)

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What is the domain and range?

Multiple Choice

What is the vertex?

• (-3, 0)

• (3, 0)

• (0, 18)

• (18, 0)

Multiple Choice

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

Multiple Select

What are the zeros of the function? Choose all that apply.

• x = 0

• x = -3

• x = -6

• y = 18

Multiple Choice

What is the equation of the axis of symmetry?

• y = 0

• x = 0

• x = 3

• x = -3

Multiple Choice

What is the domain of the graph?

• (-inf, inf)

• (-inf, 3]

• I was definitely not listening to Mrs. Kuhlman

• I'm so sorry Mrs. Kuhlman, it won't happen again

Multiple Choice

What is the range of this graph?

• [-9, inf)

• (-inf, -9]

• (-inf, inf)

• I am ashamed to say I was again not paying attention during this part and I have deeply disappointed Mrs. Kuhlman