Answer:

To estimate how far Lin walked in total, we can round the distances she walked to the nearest half mile:

One and five-eighths miles is closer to 1.5 miles than to 1.75 miles.

Five-sixths of a mile is closer to 1 mile than to 0.5 miles.

So, rounding each distance to the nearest half mile, Lin walked approximately:

1.5 miles to the park

1 mile to the smoothie shop

Therefore, Lin walked approximately 2.5 miles in total.