In general, the pointis on the graph of the function f(x) = a.b.

Recall that, for any number x:
[tex]x^0=1.[/tex]Therefore:
[tex]f(0)=ab^0=a.[/tex]We can conclude that the following point is on the graph of f(x):
[tex](f(0),a)=(0,a).[/tex]