Katarina drew a map to plot her running path as shown below.

A running path is 0.5 + 2.2 + 0.9 + 3.2 inches long.

If the total distance that she ran is 11.56 miles, how many miles does 1 inch on her map represent? Round to the nearest tenth if necessary.
0.4 miles
0.6 miles
1.7 miles
2.1 miles