8 DT 2 Relation and Function

Daily Test Mathematics
RELATION and FUNCTION
Grade/ Smt : VIII/ 1

Name:
Class : 8 RSBI 1

Number:

Choose the correct answer at one of the letters of A,B,C, or D
1. The following arrow diagram expresses relation ... .
a. less than
b. more than
c. factor of
d. square of
2. Relation from A to B which are shown at the following cartesian diagram is ... .
a. multiplication of
b. factor of
c. less than
d. equal to

3. Given:

P={(1,1), (1,2), (2,2), (3,3)}
Q ={(1,1), (2,3), (3,3), (4,1)}
R={(1,1), (2,3), (3,4), (3,5)}
S ={(1,1), (2,3), (3,3), (3,4)}
The set of Ordered pair which state a function is ... .
a. P
c. R
b. Q
d. S

4. The following arrow diagram expresses which state a function from set P to set Q is ... .

5. Given A = {2,3,4,5} and B = {3,4,5,6}, a relation from set A to set B is ”one less than” If the
relation is expressed in set of ordered pair is ...
a. {(2,1), (3,2), (4,3), (5,6)}
c. {(2,3), (3,4), (4,6), (3,5)}
b. {(1,2), (2,3), (3,4), (4,5), (5,6)}
d. {(2,3), (3,4), (4,5), (5,6)}

6. The Domain of the following function is ... .
a. {1,2,3,4}
b. {1,2,6}
c. {1,6}
d. {3}
7. Range of the function as shown at the following arrow diagram is ... .
a. {1,4,9,10}
b. {1,2,3,4}
c. {1,2,3,4,5}
d. {5}
1
8. A function f is defined by formula f ( x )=7− 2 x with x∈ {−2,0,2,4 } . Range of the function is
... .
a. {6,7,8,9}
c. {8,6,4,2}
b. {8,7,6,4}
d. {8,7,6,5}

9. Given P={a,b,c,d} and Q={1,2,3}. The number of all possible function from set P to set Q is ... .
a. 81

c. 12
b. 64
d. 7

10. Given A={1, 9, 4, 5} and B={a,b,c,d}. The number of all possible one-one correspondence from
set A to set B is ... .
a. 12
c. 24
b. 16
d. 64
11. A function from P to Q expressed as
a.

f

b.

f

1

: x→2
1
: x→2

{(1,2 ) , ( 2,3 ) , ( 3,3 ) , ( 4,4 ) }
1
2

1
2

x−2

c.

f

x+ 1

d.

f

1
:x→2
1
: x→ 2

2

12. Function f given with formula f : ( x )=7−2 x+3 x
a. -16
c. 28
b. -14
d. 40

. The formula of the function is ...

x+ 2 .
x+ 3 .

, image of -3 from those function is ... .

13. A linear function is defined with formula f ( x )=ax+b with x ∈R .
If f(-2) = -8 and f(5) = 13, the value of a and b consecutively are ... .
a. -3 and 2
c. 7 and -12
b. -2 and 3
d. 3 and -2
14. Graph beside with

x∈R , is shows function ... .

a . f ( x )=x +2
b . f ( x )=x+1
c . f ( x )=2 x +1
d .f ( x ) =2 x−1
15. A function f on integer with f ( x )=2 x−3 , is expressed in ordered pair set as
{(a,3),(b,-5), (-2,c), (-1,d)}. The value of a+b+c - d is ... .
a. -8

c. 2
b. 1
d. 0
16. If f(x) = 3x – 2 and f(a) = 19, then the value of a is ... .
a. 6
c. 55
b. 7
d. 57
2
17. Given function f ( x)  2 x  7 x  5 . The value of f (3)  f (3) is… .
a. 46
c. 42
b. 44
d. 40
18. A function is defined with formula f(x) = ax + b.
If f(-2) = 14 and f(3) = -1, than the value of f(2) is ... .
a. -4
c. 2
b. -3
d. 14

19. A function is defined as f : x � 3x  1 , With the domain is { x∨−1≤ x ≤ 2, x ∈real number }
The Range of those function is …
a. { y∨−4 ≤ y ≤5, x ∈ real number }
c. {–4, –1, 2, 5}
b. { y∨2 ≤ y ≤ 7, x ∈real number }
d. {1, 2, 4, 7}
20. From the following graphs that show correspondence one to one is..…
a.
c.

b.

d.