1. Lines - Gradient – Worksheet A
In this activity students use lines with gradients to stun aliens.
The worksheets can be completed individually or competitively with
students taking turns and recording the stuns they have achieved.
Worksheets increase in difficulty and are in a variety of 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’.

4. Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below.
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it.
1 2 −1 1 2
− 1 3 −4
1 3
− 1 4
− 1 2 3 4 −2
1 4 −3 1

5. ×
Gradient = 1
Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below.
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it.
1 2 −1 1 2
− 1 3 −4
1 3
− 1 4
− 1 2 3 4 −2
1 4 −3 1

6. × × Gradient = 1 Gradient = 2 1 1 2 −1 1 2 − 1 3 −4 1 3 − 1 4 − 1 2 3
Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below. ×
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it.
Gradient = 2
1 2 −1 1 2
− 1 3 −4
1 3
− 1 4
− 1 2 3 4 −2
1 4 −3 1

7. 3
1/3 1
Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below. 4
1/2
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it. 2
−1/4
1/4
1 2 −1 1 2
− 1 3 −4
1 3
− 1 4
− 1 2 3 4 −2
1 4 −3
−1/2
−1/3 −2 −4 −3 −1 1

8. 1/2 2 4
Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below.
3/2
2/3
1/3
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it.
4/3
−1/3
1 3 2
3 2 −4
− 1 2
− 1 4
− 2 3
4 3
1 2 −2
2 3
1 4
− 1 3 4
− 3 2
1/4
−1/2 −4
−1/4 −2
−3/2
−2/3 2

9. Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below.
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it.
1 2 −1 1 2
− 1 3 −4
1 3
− 1 4
− 1 2 3 4 −2
1 4 −3 1

12. Earth is being invaded!
You need to stun the aliens before
they reach the tower!
Your laser turrets at A, B and C
can shoot at any
of the gradients below.
Choose A, B or C.
Choose a gradient from below.
Plot the line.
You must hit the alien’s dot exactly to stun it.
1 3 2
3 2 −4
− 1 2
− 1 4
− 2 3
4 3
1 2 −2
2 3
1 4
− 1 3 4
− 3 2 2

15. 3 Earth is being invaded! You need to stun the aliens
before they reach the tower!
Your laser turrets at
A, B and C
can shoot at any gradient.
Choose A, B or C.
Decide on a gradient for the laser shot.
Plot the line.
You must hit the alien’s dot exactly to stun it. 3

18. 4 Earth is being invaded! You need to stun the aliens
before they reach the tower!
Your laser turrets at
A, B and C
can shoot at any gradient.
Choose A, B or C.
Decide on a gradient for the laser shot.
Plot the line.
You must hit the alien’s dot exactly to stun it. 4

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