You’ll be happy to know then that it is written in the Constitution that Senators must be at least 30 years old to be elected and a Representative must be at least 25 year old. Also the President must be at least 35. No worries about young kids fresh out of school being elected without a Constitutional amendment.

Graph doesn’t really mean much considering that you can’t be a Senator unless you are at least 30 (per the Constitution) and the median age of the population will include everyone not even eligible to serve in the Senate (newborn to 29). Make more sense to do a median age of 30+ year old only vs. median Senator age.