Curtis's house: (-4,-6)
Jean's house: (-4,3)
Distance: -6 to 3 = 9 miles
Curtis travels = 12 miles per hour
speed = distance / time
12 miles/hr = 9 miles / time
12 miles/hr * time = 9 miles
time = 9 miles * 1hr/12 miles
time = 0.75 hour
1 hour = 60 minutes
60 minuts * 0.75 = 45 minutes
It would take 45 minutes for Curtis to ride from his house to Jean's house