Does "f" mean the same thing as "f(x)"?? I'm wondering if [tex]f[/tex] means the same thing as [tex]f(x)[/tex]. Does [tex]f[/tex] refer more to the graph and f(x) refers to the y-coordinate of the graph? Which one should I use to complete this sentence?: ___ is increasing on interval (-1,2) or ___ has a relative minimum at x=0. My book uses [tex]f[/tex] but my teacher uses [tex]f(x)[/tex] so I'm wondering if my teacher would mark me off if I used [tex]f[/tex]. Probably not right?