1st  Wave 
[Labeled "f(x,t)"]
Left to Right
Amplitude  
Frequency
2nd  Wave
[Labeled "g(x,t)"]
Right to Left
Amplitude  
Frequency
Superposition of 
1st and 2nd Waves

NOTE: The Bottom Wave will be a "standing wave" i.e. it does not move either forward or backward only if ...

To verify the above statements, change the amplitude and/or frequency of either wave so that they do not match those of the other wave, and click outside the box after you have made the change.
See the result (bottom wave).

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