1. Linear Graphs – Gradient-Intercept Method – Worksheet C
In this competitive activity students attempt to destroy enemy ships
using equations of lines.
You may want to specify exactly what type of equation students must use.
You can increase/decrease the time to play by adding/removing ships.
The worksheet is provided in 2 sizes.

2. Printing To print handouts from slides -
Select the slide from the left. Then click:
File > Print > ‘Print Current Slide’
To print multiple slides -
Click on a section title to highlight all those slides,
or press ‘Ctrl’ at the same time as selecting slides to
highlight more than one. Then click:
File > Print > ‘Print Selection’
To print double-sided handouts -
Highlight both slides before using ‘Print Selection’.
Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

3. Use equations of a straight line to defeat the enemy fleet!
Interceptor
Scout
Heavy
Lifter
Mothership

4. Draw the boxes for each ship on your grid.
One ship must be in each quadrant.
To fire a shot, state the equation of a straight line.
A shot hits a box if it goes through or beside it.
Only one box is destroyed per shot.
If hit, the player must state the quadrant and the ship.

5. If you need to, fold your paper to show
your opponent where the shot/line should be!

6. Only cross off one box per hit.
𝑦=5
Hit, mothership,
quadrant ①.
Only cross off one box per hit.

7. Only cross off one box per hit.
𝑦=𝑥+4
Hit, mothership,
quadrant ①.
Only cross off one box per hit.

8. Only cross off one box per hit.
𝑦=2𝑥+1
Hit, mothership,
quadrant ③.
Only cross off one box per hit.

9. Galactic Strike! Galactic Strike! HOME HOME OPPONENT OPPONENT Heavy
Lifter
Scout
Heavy
Lifter
Scout
HOME
HOME ② ① ② ①
Interceptor
Interceptor
Mothership
Mothership
Draw the boxes for your
4 ships in your HOME grid,
1 ship in each quadrant.
Players fire a laser shot
across the galaxy by
stating the equation
of a straight line.
Record your shots in the
OPPONENT grid.
A shot hits if it goes through
or beside a ship’s box.
1 shot = 1 box destroyed
The player must state which
ship it hit & in which quadrant.
A ship is destroyed when
all its boxes have been hit.
Draw the boxes for your
4 ships in your HOME grid,
1 ship in each quadrant.
Players fire a laser shot
across the galaxy by
stating the equation
of a straight line.
Record your shots in the
OPPONENT grid.
A shot hits if it goes through
or beside a ship’s box.
1 shot = 1 box destroyed
The player must state which
ship it hit & in which quadrant.
A ship is destroyed when
all its boxes have been hit. ③ ④ ③ ④
OPPONENT
OPPONENT ② ① ② ① ③ ④ ③ ④

11. tom@goteachmaths.co.uk Questions? Comments? Suggestions?
…or have you found a mistake!?
Any feedback would be appreciated .
Please feel free to