Transformations
For Mrs. Ripkens grade 9 minions.
- 1.
If point P has coordinates (2,-3), then P’ will have the following coordinates after the translation [3,-1]
- A.
(5, 2)
- B.
(1, -4)
- C.
(5, -4)
- D.
(5, -2)
Correct Answer
C. (5, -4)Explanation
[3, -1] is a translation that moves the point two to the right and down one. So P(2, -3) becomes (5, -4) because you add 2 + 3 and -3 + -1.Rate this question:
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- 2.
The image of P(-2,5), after a 180o rotation around the origin will be:
- A.
(-2, -5)
- B.
(-5, 2)
- C.
(5, 2)
- D.
(2, -5)
Correct Answer
D. (2, -5)Explanation
If you were to plot this on graph paper, after a 90 degree rotation clockwise (you could do it counterclockwise too) would be (5, 2), and then 90 degrees after that would be (-5, 2).Rate this question:
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- 3.
Identify the coordinates of N’ if N(2,-1) is reflected through the x-axis
- A.
(2, 1)
- B.
(-2, -1)
- C.
(-2, 1)
- D.
(1, 2)
Correct Answer
A. (2, 1)Explanation
Reflecting in the x-axis leaves the x-coordinate the same and the y changes sign.Rate this question:
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- 4.
After a reflection, the image of X(3,4) is X’(-3,4). Therefore, the line of reflection is
- A.
The x-axis
- B.
The y-axis
- C.
Over x=1
- D.
Over y=1
Correct Answer
B. The y-axisExplanation
In this reflection, the y values stay the same and the x values change, therefore it must be reflected over the y-axis.Rate this question:
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- 5.
A _________________ is a transformation that changes the size but not the shape of the figure.
- A.
Translation
- B.
Rotation
- C.
Dilitation
- D.
Reflection
Correct Answer
C. DilitationExplanation
It's a definition! Look it up!Rate this question:
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- 6.
A _________________ is a transformation that flips a figure across a mirror line.
- A.
Translation
- B.
Rotation
- C.
Dilitation
- D.
Reflection
Correct Answer
D. ReflectionExplanation
Definition again!Rate this question:
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- 7.
What is the scale factor of a 450cm truck reduced to a model 10cm long?
- A.
1/45
- B.
45
- C.
1/10
- D.
10
Correct Answer
A. 1/45Explanation
We have reduced, so the scale factor must be less than one. Then we need to find the ratio of 10 to 450 in lowest terms which is 1/45.Rate this question:
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- 8.
Which one does not fit in with the others?
- A.
[-5, 6]
- B.
(x, y) --> (x+5, y-6)
- C.
Up six units and to the left five units
- D.
L5, U6
Correct Answer
B. (x, y) --> (x+5, y-6)Explanation
In B, we are moving the point five to the right and six down.Rate this question:
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- 9.
When a figure is rotated 90 degrees clockwise about the origin, its y-coordinate becomes its
- A.
Y-coordinate
- B.
X-coordinate
- C.
Negative y-coordinate
- D.
Negative x-coordinate
Correct Answer
B. X-coordinateExplanation
x-coordinate!Rate this question:
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Mar 19, 2022Quiz Edited by
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Dec 17, 2008Quiz Created by
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