In the given question, we come to know that Sammy sold 5 bottles for every 3 water bottles sold by David. In this case we get the ratio as 5:3 Now this ratio indicates that the total number of bottles can be divided into 8 parts for finding out a single part. the total number of water bottles that are sold by Sammy and David together are 160. Now on dividing this total number of bottles by 8 we get the 20 as one part. The, Number of Bottles sold by Sammy = 5 * 20 = 100 Number of bottles sold by David = 3 * 20 = 60 So Sammy sold 100 water bottles and David sold 60 water bottles from the total of 160 water bottles.
To find out if a relation is a function, we need to use the vertical line test, which means each input value only has one output value. This graph does not pass that vertical line test.
