Answer:
Gretchen will earn $48 from mowing in 4 hours
Data
Amount earned on each lawn = $12
Number of hours mowing = 4 hours
Explanation:
This is the measure of one unit against another unit. An example of this is speed which is the rate of distance covered to time.
In this case, she mows 1 lawn in each hour and earns $12 on each.
To calculate for 4 hours
She earns $48 from mowing 4 lawns