What the slope represents.
Toy Race Car
*(4, 21)
Distance (ft)
(2, 13)
0
6
1 2 3 4 5
Time (s)

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.