no, it is a simple equation. you can recognize a functtion by the first string which is f(x) and it is defined by x also. in your case, a function would have looked like:
on the other hand... if you think that y = f(x)... then you can look at it as a function. seems that my math memory is not so great. so, sorry to have confused :(
on the other hand... if you think that y = f(x)... then you can look at it as a function. seems that my math memory is not so great. so, sorry to have confused :(