Page 258 - Math Smart - 7

CHAPTER 11.3
-t'K-A
In this chapter
Drawing Lines Parallel to
Pupils should be able to:
• generate coordinate
pairs that satisfy a linear the y-axis or the x-axis
equation, where y is
given explicitly in terms
of .V
• plot the corresponding
t
graphs Investigate!
• recognise straight-line
graphs parallel to the Two straight line graphs are drawn on the coordinate grid shown below.
X- or y-axis

What equation

->A
-5 -4 -3 -2 -

Check My
..=4
Understanding

O 3) On a graph paper, a) Use the graphs to help you complete the following tables.
draw a set of axes
from -5 to 5. Use Horizontal Line
the tables above X -A -3 -2 -1 0 1 2 3 4
to plot each linear
y
graph. Label
each line with its Vertical Line
equation.
X
b) On the same set -4 -3 -2
y 0 1 2 3 4
of axes, draw and
b) What do you notice about the y-coordinates of the points on the horizontal
label the following
line?
straight lines.
c) What do you notice about the x-coordinates of the points on the
1) A = -3
vertical line?
ii) a = 4
d) Write down the equation of the horizontal line and the vertical line on the
iii)y = 2
coordinate grid.
iv) y = -5

25^ mMITII I Coordinate Geometry and Graphs