the highest possible grade for a book report is 100 the teacher deducts 10 points for each day the report is late which kind of function describes the situation 1)linear 2)quadratic 3) exponential decay 4) exponential growth. which of the three situation giving below is best model by exponential function 1) a bacterial culture double in size every day 2) a plant grow by 1 inch every 4 days 3) the population of a town declines by 5% every 3 years. 1) 1 only 2) 2 only 3) 1&2 4)1&3