Help with geometrical transformation questions?

Question

Hi, ive just done an exercise based on geometrical transformations but I got stuck on five of the questions. Can anybody hel me with them. I have to describe in words what these matrices do...

1)

-2 0

0 2

2)

4 0

0 -1

3)

3 0

0 5

4)

-3 0

0 -3

5)

3 0

0 -3

thx for any of ur help

Answer 1

Try them out on the matrix

a  b

c  d

and then describe what the operation does.

Go on. Give it a go.