The table shows how much water was in a swimming pool as it was
being filled.
Time (min)
Amount of water gallons]
What does the Slope represent in this situation?
A. The increase in water per minute
B. The minutes per increase in water
C. The initial amount of water in the pool
D. The number of gallons of water

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.