# SOLUTION: How do you find if it is a function or not a function.

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 Question 20887: How do you find if it is a function or not a function. Answer by queenofit(120)   (Show Source): You can put this solution on YOUR website!If you are asking how to determine if an equation is a function or not, I think I can give you an example. You didn't give any numbers so I will. first start with the definition of a function: a function "F" from set A to set B is a rule of correspondence that assigns to each element in A exactly one element in B. In other words there can be only one answer for it to be a function. for example: -x^2 + y = 3 y= x^2 + 3 this equation can only give one answer, it is a function However, -x + y^2 = 3 y^2= x + 3 y = the square root of x+3 and the neg. of the square root of x+3 this equation has more than one answer and therefore cannot be a function. Hope this helps you with your problem.....