A function is defined as a set of ordered-pairs where .... But can we consider equations as functions? Some says 'yes'. Some says 'no', because according to them, equations are not actually functions. They are just used to define/represent functions. example: y=4x+1/f(x)=4x+1. Can we consider this as a function? Or, it is just an equation that defines/represents a function? Thank you!!!