1. Day 3
What is an equivalent form of the following function? f(x) = 3(x – 2)2 + 4
x2 – 4x
x2 + 8
3x2 – 4x + 8
3x2 – 12x + 16
2 minutes

2. Domain and Range
Objective: SWBAT identify the domain of a quadratic function given a graph or real life application.
(2.1.b.ii) CCSS: F-IF.5
DOL:
Given 2 multiple choice and 1 CR, sw identify the domain and range of a quadratic function with 100% accuracy

3. Vocabulary
Domain: All possible input values, x values. Parabola always getting wider therefore the domain is always (-∞,∞)
Range: All possible output values, y values. Since we have minimum or maximum point the y-value always limited
To help students, may help to talk about range like a mountain range

4. Graphs: Notes Find the domain and range from the following graph:
(-∞, ∞ )
Range:
(-∞, 4]
Ask how this graph is different from the last graph?
**Using different notation**

5. Graph: Sage and Scribe (Person with darker shirt)
Find the domain and range of the following graph:
Domain:
____________
Range:
___________

6. Graph: Sage and Scribe (Person with lighter shirt)
Find the domain and
range from the following
graph:
Domain:
___________
Range:
___________________

7. Another way to write it…
Find the domain and
range from the following
graph:
Domain:
(-∞, ∞)
Range:
[-2, ∞)
Explain how it’s the same. Maybe show how it translates to other way

8. Your turn… Whiteboards
Find the domain and range from the following graph:
Domain:
_______________
Range:
________________

9. Summary From a graph, you can find domain by…
From a graph, you can find range by…
From an equation, I can find domain by…
From an equation, I can find range by…

10. DOL #2
State the domain and range of the following graph using words: