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04 Reflections.notebook
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August 31, 2017
Bellwork
What is the rule? A
A'A(4, 5)A'(2, 2)
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Reminders: If you want to retake the quiz: come in before or after school. You get ONE retake.
Honors: homework
Objective:
SWBAT reflect a preimage.
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Today: Finish the Reflections Activity. Notes. Practice graphing lines.
Please: Cell phones completely away. Bags and backpacks under your desk.
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Get out the "Reflections Activity" and your ruler.You are responsible for making nice, neat, straight lines.
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A
BC
D
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A
BC
D
'A
B'C'
D'
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A
BC
D
A'
B'C'
D'
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A'
B'C'
D'
A
BC
D
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A' (4, 10)B' (8, 4)C' (4, 3)D' (2, 6)
A
BC
D
A'
B'C'
D'
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1. Suppose I had the rule (x, y) (x, y) and the points:A(3, 5)B(4, 6)C(0, 8)D(5, 0)
What are the values of A', B', C', and D' ?
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2. A transformation has the rule (x, y) (x, y). Answer the following:
A) Which values change: x or y?B) Knowing this, is this going to produce a reflection about the xaxis or yaxis?
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A reflection (or flip) is a mirror image.
notice the lines of reflection
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Graphing Lines(note: you need to know the graphs of basic lines because they are used for lines of reflections)
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A horizontal line has the form y = any number
Example:
y = 2
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A vertical line has the form x = any number
Example:
x = 5
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Lines With a yintercept of Zero
Example:
y = x
Go through the origin
(slope = 1)
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Lines With a yintercept of Zero
Example:
y = 2x
Go through the origin
(slope = )21
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Receive the worksheet titled "Graphing Lines". This will give you practice in knowing lines of reflection.
