An indoor trampoline park has an admission fee, plus
an hourly charge. The graph displays the total cost
from 3, 4, 5, and 6 hours of play. Determine the hourly
charge, assuming the relationship is linear.
Rate of change = $
per hour

i got 10.28 but that rounds up to 10.3

12

step-by-step explanation:

12 + 5 = 17

12x2=24

24-7=17

it will take lin 15 minutes   to empty her hot tub

0.61 has 2 decimal places, so we put the decimal digits of 0.61, 61 over 1 followed by the number of zeroes equal to the number of decimal places, 

2:     61/1 = 61/100.