freemantruthshell freemantruthshell 05-06-2023 Mathematics contestada A merchant uses the rule: selling price equals cost plus 10% of cost. This is a function. _-_-_Why?_-_-_ _-_-_Why?_-_-_ _-_-_Why?_-_-_ _-_-_Why?_-_-_ _-_-_Why?_-_-_