Re: Two sine waves 180 degrees out of phase
If it was a duopoly they would not have to cheat with the axes... As somebody above wrote: AMD is just the noise on Intel's sales.
In a case like this I believe Tufte and others would recommend using
- a single graph showing a stack (not the best, you absolutely need to include the zero)
- two graphs stacked (ditto)
- a single graph showing AMD as a percentage of Intel sales
In principle one line is (as per the duopoly comment) redundant anyway...