Final answer:
The guidance counselors can use either a pie graph or a bar graph to represent the enrollment in different schools. If they want to show the percentage of each school's enrollment, they should use a pie graph. If they want to show the exact numbers of students and the relative sizes of each category at each school, they should use a bar graph.
Step-by-step explanation:
The guidance counselors can use either a pie graph or a bar graph to represent the enrollment in different schools. If they want to show the percentage of each school's enrollment, they should use a pie graph. They can use different colors to represent different schools and point out which color represents part-time students and which represents full-time students. On the other hand, if they want to show the exact numbers of students and the relative sizes of each category at each school, they should use a bar graph. They can indicate the scale and the total numbers for each category in the bar graph.