Hi there.
Each line on the graph is equivalent to: 1/6
SO we can see that n is graphed at: 1 1/6 and m is graphed at: 2 4/6
To estimate the product, let's convert each fraction into an improper fraction.
n = 1 1/6 = 7/6
m = 2 4/6 = 16/6
Multiply the improper fractions.
7/6(16/6) = 112/36 = 3 4/16 = 3 1/9 (Simplified)
So 3 1/9 is your answer.