Page 248 - Math Smart - 7

CHAPTER 11.1

In this chapter
Coordinate Grid
Pupils should be able to:
• read and plot coordinates
of points determined by
geometric information in ^ RECALL
all four quadrants
• generate coordinate
pairs that satisfy a linear Look at the grid reference. Can you
equation, where y is describe the position of an object using
given explicitly in terms
grid reference?
of jr queer

O Spotlight © Look at the coordinate grid.
a) Is the point (2, 5) the same as the
point (5, 2)7
Recall what an ordered
pair is and follow the b) Mark and label point A (1, 1), point
characters in the video B (2, 5) and point C (4, 1) on the
to find out what the grid
four quadrants in a c) Mark and label point P (0, 4), point
coordinate grid look like. Q (3, 1), point R (4, 4) and point
S (5, 3) on the grid.
Then draw the lines PQ and R5. 1 2 3 4 5

Grid references

We have learnt to give the position of an object on a grid by stating the column
first, then the row. For example, a square in Column D and Row 3 is D3.

Try and Apply!

Let's play Battleships
Battleships\% a game played on coordinate grids. Each player's
fleet of ships is marked on their grids. The location of the ships
are hidden from the other player. Players take turns calling
'shots' at the other player's ships. The objective of the game is to
destroy the opposing player's ships before your opponent sinks
all your ships.
► Figure 11.1 A battleship is a large, heavily armoured warship
equipped with many powerful guns.

Coordinate Geometry and Graphs