if we are graphing by
[tex]f (x) = \frac{1}{x} [/tex]
then we can simply plug in several values for x to see what we get
i.e. if we put in 1, we get 1
2, we get 1/2
5, we get 1/5
from this, we can already see that only one graph matches these coordinates
the 4th graph is your answer
