Which of the following is a point on the graph of y = (1/2) x

Which is the graph of the function y=2(4)^x

Which ahows the graph of the solution set of 6x+4y< 12

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.