Parallel lines are preserved in which of the following types of transformations? I. rotations
II. reflections
III. translations
A.
I, II and III
B.
I only
C.
I and II only
D.
I and III only

Which of the following lines is not parallel to the graph of y = 4x +7?

15 point ! ~ see if you know the answer to both you!

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.