Chapter3: Graphs And Functions
Section3.5: Relations And Functions
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Name:
Section:
MASTERY TEST FOR QUARTER 2 WEEK 3
GRADE 8 MATHEMATICS
Direction: Write only the letter of the correct answer on the blank provided at the left of the number.
1. Which of the following sets of ordered pairs represents a function?
A. { (0,2), (1, 3), (2, 4), (3, 5), (4, 6) }
B. { (0,0), (4, 2), (4,-2), (9,3 ).(9,-3)}
2. Which of the following equations represents a function?
A. y = 3x-6
B. 7x - 5 = y
3. Which of the following represents a function?
A. x² +y = 2
B. x+ y= 2
4. In how many point(s) does a vertical line intersect the graph of a function?
A. at least one point
B. at exactly one point
5. Which of the following is an example of a one-to-one relation?
A. {(1,1), (1,-1), (2,2), (2,-2), (3,3), (3,-3)}
B. {(a, p), (b, q), (c, r), (d, s), (e, t), (f, u)}
6. Given the mapping diagram at the right, which set of ordered pairs described the mappings of
elements in set A to B?
A. {(-2, -3),(-1,-1).(0,-1),(1,1),(2,1)}
B. {(-2,-3),(-1,-3),(0,-1),(1,1),(2,1)}
C. {(-2,3),(-1,-1).(0,-1).(1,1).(2,-1)}
D. {(2,-3),(-1, -3).(0,-1),(1,1).(2, -3)}
7. Given the function f(x) = 2x - 5, find the value of f(4).
A. 7
C. { (0,2), (1, 3), (1, 4), (3, 5), (3, 6) }
D. { (0,1), (0, 2), (0, 3), (0, 4), (0,5) }
C. 6x +y = 12
D. y+y = 4x+ 5
C. x+y = 10
D. x+2y? = 10
C. more than one point
D. at exactly two points
C. {(q, 3), (r,3), (s, 5), (t,5), (u, 4), (v, 4)}
D. {(1,1), (1,2), (1,3), (1,4), (1,5), (1,6)}
B. 0
C. -3
D. 3
8. Given the function f(x) = 3x - 1, which of the following illustrates the ordered pairs of the function?
A. {(-2,-7),(-1,-4),(0,-1).(1,2),(2,5)}
C. {(-2,-6),(-1,-3),(0,-1),(1,4),(2,5)}
D. {(-2,-5).(-1,-3),(0,1),(1, -3),(2,6)}
B. {(-2,7),(-1,4),(0,-1),(1,-2),(2,-5)}
9. Given: y = 7x-5, which representation best describes the relation?
A. Rule
B. Table
C. Graph
D. Mapping/Diagram
For items 10- 12. Ana and her mother went to the market to buy fish for their picnic. The fish that they
want to buy has a price of P300 per kilo, but the vendor is willing to give them a discount of P50.
10. What function best describes the relation if y represents the amount of money they will pay and x
represents the weight of the fish in kilograms?
A. y = 300x + 50
11. If Ana and her mother will buy 5 kilos of fish, how much will they pay?
A. P1,550
12. If Ana and her mother will be given a discount of P100.00 for every purchase of 5 kilos and they
will buy 10 kilos, how much does it cost?
A. P2,600
B. y = 50x + 300
C. y= 300x-50
D. y = 50x – 300
B. P1,450
C. P1,350
D. P1,250
B. P2,700
C.P2,800
D.P2,900
Vhich of the following ordered pairs shows one-to-one correspondence?
A. {(Christian, Row 1),(Johny, Row 2),(Charles, Row 2)}
B. {(pencil, paper),(ball pen, paper),(ink, printer),(ink, marker pen)}
C. {(Ms.Cali, Eng.Teacher), (Ms.Cali, EsP Teacher), ( Ms.Cali, Sci. Teacher)}
D. (English, red notebook), (Science, blue notebook).(Math, yellow notebook)}
14. Which of the foliowing mapping diagram illustrates a many-to-one correspondence?
13.
D.
B.
C.
A.
-3
15. The rule 5x + y = 3 represents a relation. What would be the value of y when x = -3?
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