Just take 2 points for x and find y value.
Let's take
x = 0 and x = 1
When x = 0,
[tex]y=6(\frac{1}{3})^0=6[/tex]
(0,6) is a point.
Now,
When x = 1,
[tex]y=6\cdot(\frac{1}{3})^1=6\cdot\frac{1}{3}=2[/tex]
(1,2) is a point.
Now, create a smooth curve, like the one shown below:
