3.2 Writing Quadratic Functions

Write a possible equation of the parabola. Start with y=

Mathematical Equivalence

ON

Tags

CCSS.HSF-IF.C.7A

According to the given information, which would be the equation of the parabola?

Write a quadratic equation given the x intercepts and one other point.

Step 1: Write the factors.

The intercepts of this function are (6, 0) and (8, 0). Write the factors.

• (x-6) and (x-8)

• (x+6) and (x+8)

• (x-6) and (x+8)

• (x+6) and (x-8)

Tags

CCSS.HSF-IF.C.7A

Match the description to its equation.
Moves down 1
Moves right 1

• A
• B
• C
• D

If the directrix is above the vertex the parabola opens ​ (a)   and if the directrix is below the vertex the parabola opens ​ (b)  

• down
• up
• left
• right

Parabolas can open which of the following ways?

• Up

• Down

• Right

• Left

The parabola y = -2x² - 4x + 1 will open

• up

• down

Tags

CCSS.HSF-IF.C.7A

The parabola y = -2x² - 4x + 1 will open

• up

• down

Tags

CCSS.HSF-IF.C.7A

The parabola y = x² - 2x + 4 will

• open up

• open down

Tags

CCSS.HSF-IF.C.7A

• upward

• downward

Tags

CCSS.HSF-IF.C.7A