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# EOCT Practice - PowerPoint PPT Presentation

EOCT Practice. Question of the Day. CCGPS Geometry. UNIT QUESTION: How are real life scenarios represented by quadratic functions? Today’s Question: How do we graph quadratics in standard form? Standard: MCC9-12.F.IF.8. Coefficients. a, b, and c are coefficients. Examples:

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### EOCT Practice

Question of the Day

UNIT QUESTION: How are real life scenarios represented by quadratic functions?

Today’s Question:

How do we graph quadratics in standard form?

Standard: MCC9-12.F.IF.8

a, b, and c are coefficients

Examples:

Find a, b, and c

A > 0

Therefore, the

parabola

opens up

A < 0

Therefore, the

parabola

opens down

Determine if the Parabola

Opens Up or

Opens Down

Axis of SymmetryVertex Point

• Axis of symmetry is found using

• To find the y coordinate of the vertex

• point, substitute x into the equation

• and solve for y.

Find the vertex point

in Standard Form

3. Find the axis of symmetry:

(vertical line)

2. Identify the values of a, b, and c.

back into the original equation and solve for y).

5. Construct a table of values for x and y. Choose

values of x, two above and two below your vertex.

6. Plot the points and connect them with a U-shaped curve.

parabola will open up.

If a is negative, then the

parabola will open down.

Graph opens up or opens down?

a = -1

b = 2

c = -1

Tell whether the graph opens up or down. Graph each using a T-chart. Find the axis of symmetry &  vertex . Use a dotted line to graph the axis of symmetry.

OPENS UP

a = 1

b = -6

c = 5

OPENS DOWN T-chart. Find the axis of symmetry &

a = -1

b = -2

c = 3

OPENS DOWN T-chart. Find the axis of symmetry &

a = 1

b = 2

c = -6

OPENS UP T-chart. Find the axis of symmetry &

a = 1

b = 8

c = 13

OPENS UP T-chart. Find the axis of symmetry &

a = -1

b = 2

c = 0

Homework T-chart. Find the axis of symmetry &

Practice Worksheet