Thabo opened a car wash at his home to earn some additional income. He operates the car wash after hours and on weekends so that it does not interfere with his regular job. As could be expected, it seems to Thabo that his water bill varies in line with the number of cars he washes every month. You have been given the following information: Month Number of cars Monthly bill washed R March 2022 60 1 598 April 2022 55 1 405 May 2022 30 833 June 2022 26 731 July 2022 48 1 292