Final answer:
To calculate the unit rate in miles per inch, set up a proportion using the given information and solve for x. The unit rate is 3 miles per inch.
Step-by-step explanation:
To calculate the unit rate in miles per inch, we can set up a proportion using the given information. The distance between the lower waterfall and the upper waterfall is 1 and 1/2 miles and the distance between the falls on the map is 1/2 inch. Let's set up the proportion:
1.5 miles / 0.5 inch = x miles / 1 inch
To solve for x, we can cross-multiply and solve for x:
0.5x = 1.5
x = 1.5 / 0.5
x = 3
Therefore, the unit rate is 3 miles per inch.