Answer: it mainly is by the words and descriptions you use
Explanation:
Not sure what graph you’re talking about but i know that when you play an instrument the pitches are different regarding the note and tone you play
No one is sure which made it at the very start as it is very old and has evolved majorly overtime but the first acoustic guitar that would he recognized as a guitar today was invented by Antonio de Torres Jurado and the first ever electric guitar was invented by George Beauchamp and Adolph Rickenbacker
