Page 39 - Mathematics_Form_3

Functions

(b) (b)
y y
6 6
5 5
4
FOR ONLINE READING ONLY
4
3
3
2
2
1
1
-1 0 1 2 3 4 5 6 7 x
-1 0 1 2 3 4 5 x -1
-1 -2
-2
(c)
y
(c) 4
y 3
4
2
3
1
2 x
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6
1
x -1
-6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 -2
-1
-3
-2
-3
From the figures, it can be observed that
Solution the vertical lines drawn in (a) and (b)
cross the graphs more than once, therefore
Draw a straight line parallel to the
Mathematics for Secondary Schools (a) y 3 in (c) crosses the graph only once, hence
the graphs in (a) and (b) do not represent
y-axis in each of the given graphs as
functions, while the vertical line drawn
shown in the following figures:
(c) represents a function.

Exercise 2.1
2
1. Represent the following set of
1
ordered pairs in a pictorial diagram:
{(1, –3 ) , (2, 2 ) , ( −1, 3 ) , ( −2, 4)}
-1
0
-1 1 2 3 4 5 x 2. Represent the following coordinates
in the xy-plane:
-2
(0, 0), (1, 1), (2, 2), (3, 3), (4, 4)

32 Student\s Book Form Three

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MATHEMATIC F3 SB.indd 32 18/09/2025 09:58:50
MATHEMATIC F3 SB.indd 32