An above ground swimming pool is leaking. after 1/2 hour the pool has leaked 7/8 of a gallon of water. how much gallons of water per hour is the swimming pool leaking?

The pool leaks 7/8 of a gallon in 1/2 hour.   Times that by 2 to find out how many gallons per hour.  7/8 x 2 = 14/8 = 1 and 3/4 gal/hour.  (1.75 gal/hour)

its a straight line parallel to the time axis