What expression is this?

How many square feet of out door carpet will we need for this hole? 8ft 3ft 12ft 4ft

Plot the points (0,6), (3,15.8), and (9.5,0) using the graphing tool, and find the function

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.