Question 7:
Use graph paper to answer this question.
Table below shows the values of two variables, x and y, of a function.


The x-axis and the y-axis are provided on the graph paper on the answer space.
(a) By using a scale of 2 cm to 5 units, complete and label the y-axis.
(b) Based on the table above, plot the points on the graph paper.
(c) Hence, draw the graph of the function.

Answer:


Solution:

Question 8:
Use graph paper to answer this question.
Table below shows the values of two variables, x and y, of a function.


The x-axis and the y-axis are provided on the graph paper on the answer space.
(a) By using a scale of 2 cm to 2 units, complete and label the y-axis.
(b) Based on the table above, plot the points on the graph paper.
(c) Hence, draw the graph of the function.

Answer:


Solution:

x	–3	–2	–1	0	1	2	3
y	–19	–3	1	–1	–3	1	17

x	–4	–3	–2	–1	0	1	2
y	31	17	7	1	–1	1	7

Question 6:
(a) Complete table below in the answer space for the equation L = x² + 5x by writing the value of L when x = 2.
(b) Use graph paper to answer this part of the question. You may use a flexible curve rule.
By using a scale of 2 cm to 1 unit on the x-axis and 2 cm to 5 units on the y-axis, draw the graph of L = x² + 5x for 0 ≤ x ≤ 4.

Answer:


Solution:
(a)
When x = 2
L = 2² + 5(2)
= 4 + 10
= 14  

(b)

Function	Value of y when
	x = 0	x = –3
y = x + 3	3	0
y = x – 3	–3	–6
y = 2x + 6	6	0 (correct)
y = 2x – 6	–6	–12

x	–2	0	1
y	–6	2	3