22. In order to show that ΔFGH is congruent to ΔF'G'H', how many degrees must ΔFGH be rotated clockwise about the origin?
What is 270°
100
12. Which set of ordered pairs below is a function?
I. {(3 , 3), (6 , 1), (2 , 3)}
II. {(4 , 7), (2 , 8), (4 , 2)}
III. {(9 , 6), (3 , 1), (7 , 3)}
What is I and III
100
3. Carrie drew a triangle labeled ΔABC in the coordinate
plane. She then dilated this triangle with the origin as the centerto form the new triangle labeled ΔA'B'C '.
Which algebraic representation represents the change in
the (x , y) coordinates from ΔABC to ΔA'B'C'?
What is (x, y ) → (2x, 2y)
100
2. Which of these statements is true about the two graphed
parallelograms?
What is B:
They are similar, because one can be obtained by
dilating the other about the origin with a scale factor of
1/2
100
30. A square is dilated by a scale factor of 0.5 about the center of the square.
What is true about the area and the perimeter of the new
square when compared to the original square?
What is C: The area is one–quarter of the area of the original
square. The perimeter is one–half of the perimeter of the
original square.
200
20. Melissa needs to translate a figure six units to the right
and two units down. Which of the following rules correctly
represents that translation?
What is (x, y ) → (x + 6, y – 2)
200
15. Which relation below is NOT a function?
What is B
200
5. Paxton drew the square that is shown on the coordinate
plane.
He then dilated this square about the origin to form
another square with coordinates of
(–5, 5), (5, 5), (–5, –5),and (5, –5).
The coordinates of the original square that he
drew can be represented by (x , y).
How can the coordinates of the second square be
represented?
What is B (5/3x, 5/3y)
200
17. Randolph is comparing workout facilities to help him satisfy his annual goal of working out 4 times per week. The costs of 4 different facilities are given below.
Excel: $25 per month
Strength: $15 per month and $100 sign–up fee
Fitness Forever: $50 for the first month and $20
for each month thereafter
City Gym: $15 for the first 6 months and $25 for
each month thereafter
Which workout facility has costs that can be written as a
proportional function?
What is Excel
200
23. A square is graphed on a coordinate plane. The square is dilated by a scale factor of 2 about the origin of the
coordinate plane. What is the perimeter of the new
square?
What is 24 units
300
18. Which set of coordinates represents the reflection of the
following image over the y–axis?
What is (6 , 2), (4 , 8), (2 , 2) or What is B
300
14. Which mapping is a function?
What is A
300
7. Consider images abcd and mnop shown on the
coordinate grid. Is image mnop a dilation of abcd ?
What is D: No, mnop is not a dilation of abcd , because the sides in mnop are not proportional to the corresponding
sides in abcd .
300
11. A survey was taken of twenty dentists about Sparkly
toothpaste. Sixteen of the dentists recommended Sparkly
toothpaste to their patients. The same survey was given to
dentists in a different state. This time they asked thirty
dentists. Twenty–four of those dentists recommended
Sparkly toothpaste to their patients. If this pattern
continues, how many dentists out of fifty would recommend Sparkly toothpaste?
What is 40
300
7. Consider images abcd and mnop shown on the
coordinate grid.
Is image mnop a dilation of abcd ?
What is D: NO because the sides in mnop are not proportional to the corresponding
sides in abcd .
400
19. If ΔKLM is rotated 90 degrees clockwise about the origin,
what would be the coordinates of point M?
What is (–6, –2)
400
13. Which of the following graphs represents a function?
What is B
400
28. A triangle having vertices at A(-8,4), B(-4,4), and
C(-4,10) is dilated by a scale factor of 1/2 to form Triangle
A'B'C'.
Which statement is TRUE?
What is A: The length of A'C' is one half the length of AC.
400
1. These shapes are similar.
Which equation could be used to find the missing value of
x ?
What is 12/9 = 6/x
400
6. Rectangle ABCD is dilated by a scale factor of 2, forming
rectangle A'B'C'D'. The dilation is centered about the origin.
How do the perimeters of the two rectangles compare?
What is A: The perimeter of A'B'C'D' is twice the perimeter of ABCD.
500
29. ΔL ' M ' N ' was created by translating a triangle 4 units down and 2 units to the right. What were the coordinates of the original triangle, ΔLMN ?
What is L (–7, 5), M (–8, 1), N (–5, 1)
500
26. Which situation BEST represents a proportional relationship?
What is C: Lamont packed 27 glasses in 9 cases and 81 glasses in 27 cases.
500
4. On the coordinate plane below, point R was dilated about
the origin to form point R '. The coordinates of R can be written as (x , y). How can the coordinates of R ' be written?
What is D (1/3 X, 1/3 Y)
500
10. Which of the following statements about the price of the cribs are true if the price remains proportional to the
number of cribs? Select two that apply.
Cribs Price
10 $1320
50 $6600
What is C 40 cribs cost $5280
AND E 80 cribs cost $10,560
500
24. Amari drew a rectangle that has dimensions of 4 × 6. She then dilated this rectangle using a scale factor of 3 about
one of its vertices.
What is true about the area of the new rectangle?
What is D: It is 9 times the area of the old rectangle.