ANSWER
KEY FOR ESSAY
1. QUESTION
: Simplify the following algebraic form
: (3y² - 2y – 1) + (3y + 5)
|
Number
|
Aspect / concept scored
|
Score
|
|
1
2
3
4
5
|
(3
 - 2y – 1) + (3y + 5)
3
- 2y – 1 + 3y + 5
3
+ (-2y + 3y) + (-1 +5)
3
+ (y) + (4)
3
+ y + 4 |
2
2
2
2
2
|
|
|
Maximum score :
|
10
|
2.
QUESTION : Look at the arrow
diagram below !
Determine domain , codomain, range of the diagram!
|
Number
|
Aspect / concept scored
|
Score
|
|
1
2
3
4
|
Suppose A = { p, q } , B = { r, s, t, u }
Domain is A = { p, q }
Co domain is B = { r, s, t, u }
Range is u
|
2
2
3
3
|
|
|
Maximum score :
|
10
|
3. QUESTION
: Determine gradient of line passing through point O (0,0) and P(4,1) !
|
Number
|
Aspect / concept scored
|
Score
|
|
1
|
Line passing through point O(0,0) and
(a,b), a ≠ 0 has gradient
 |
5
5
|
|
2
|
Therefore, gradient of line passing through
points O(0,0) and P(4,1) is
 |
|
|
|
Maximum score :
|
10
|
4.
QUESTION : Find
solution set of linear equation below by substitution method.
x + y = 12
2x + 3y =
31
|
Number
|
Aspect / concept scored
|
Score
|
|
1
2
3
4
5
6
7
8
9
10
|
·
2x + 3y =
31
2(12
– y) + 3y = 31
24
– 2y + 3y = 31
24
+ y = 31
y = 31 – 24
y
= 7
·
x + y = 12
x
+ 7 = 12
x = 12 – 7
x = 5
|
1
1
1
1
1
1
1
1
1
1
|
|
|
Maximum score :
|
10
|
5.
QUESTION : See rectangle
PQRS below :
|
|
|
|
|
If length of plane- diagonal is 1.500 cm. Determine circumference of the
rectangle!
|
Number
|
Aspect / concept scored
|
Score
|
|
1
|
 |
1
1
|
|
2
|
 |
|
|
3
|
 |
|
|
4
|
 |
2
|
|
5
|
  |
3
|
|
6
|
Circumference is 8a+12a+8a+12a =
   |
3
|
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