Which of the following correctly compares the uses of line graphs versus pie charts? line graphs show patterns in data with variables that change over time; whereas, pie charts show data as parts out of a whole (such as out of 100%). line graphs show data as parts out of a whole (such as out of 100%) within a category; whereas, pie charts show data having two or more different categories. line graphs show data involved in distinct categories that do not overlap; whereas, pie charts show data as parts out of a whole (such as out of 100%). line graphs show data involved in distinct categories that do not overlap; whereas, pie charts show patterns in data with variables that change over time.