Aim: How do we graph rotations? 

• Rotation is when an image is rotated from one point with the same distance. So here are some rules when it comes to rotating. 

1. 90 degrees:   (x,y)     →  (-y,x)
2. 180 degrees: (x,y)    →  (-y,-x)
3. 270 degrees: (x,y)    →   (y,-x)

• These rules are for counter-clockwise, except for 180 degrees. Now if a problem asks for clockwise, you should use the rule that is opposite. For example:

1. If it says "90 degrees clockwise", you could use the rule for 270 degrees counter-clockwise. 
2. If it says "270 degrees clockwise", you could use the rule for 90 degrees counter-clockwise. 

This globe/earth is going
360 degrees counter-clockwise.

• This is because if you look at a clock and try what a question is asking, it'll make sense. Just because if your going 90 degrees clockwise, it'll be the same as going 270 counter-clockwise. And if your going 180 degrees, it'll be the same either counter-clockwise or clockwise. 

Now try it yourself ! 

     ↓