Plant A is 18 inches ta after one week, 36 inches after two weeks, 56 inches after three weeks. Plant B is 18 inches tall after one week, 36 inches tall after two weeks, 54 inches after three weeks. Which situation represents a proportional relationship between the plants’ height and number of weeks?
B because its a constant rate of 18 per week while the first one is inconsistent. you can write it out as y=18x, x being the number of weeks and y being inches.
