400
                            Kenny takes care of his neighbors cats while they are away on vacation.  When he takes care of 2 cats, he earns $14.  When he takes care of 4 cats, he earns $28.  If he takes care of 7 cats, he will earn $49.  Make a chart to help you find the relationship between the number of cats and the money earned.
                            He earns $7 for each cat he watches.