what is the image? which rule describes a translation?

Mathematics
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What is the image of (1, -6) for a 180° counterclockwise rotation about the origin?

a.  (6, 1)

b.  (-6, -1)

c.  (-1, -6)

d.  (-1, 6)

Which rule describes a translation that is 3 units to the right and 5 units down?

a.  (x, y) → (x - 3, y + 5)

b.  (x, y) → (x + 3, y - 5)

c.  (x, y) → (x + 3, y + 5)

d.  (x, y) → (x - 3, y - 5)

May 7th, 2015

The rule for a 180 degree rotation (either clockwise or counter clockwise) is (x, y) --> (-x, -y).

Following this rule for the first question would give you D. (-1, 6) for your answer.

For a translation, you add to x if you move right, subtract from x if you move left, add to y if you move up, and subtract from y if you move down.

Following this rule, you would get B. (x, y) --> (x + 3, y - 5)

May 7th, 2015

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May 7th, 2015
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May 7th, 2015
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