Lawyers use functions to find out what hourly rates to charge people.
A lawyer would have a function that would be x=# Of hours and y = how much he charges per hour.
Lawyers also use scatter plots to see if something has correlation .
While trying to solve a case a lawyer may have to show evidence and if they used a scatter plot they could show how something is related to something else.
Lawyers use solving equations for things like doing their taxes. Everyone has to do their taxes or they would get arrested so lawyers must use solving equations when doing their taxes.