In a geometry class, the ratio of rulers to compasses among students is 2:1. Which of the following best describes the number of rulers and compasses among the students? (1 point) For every 1 ruler, there are 2 compasses. For every 2 rulers, there are 3 compasses. For every 3 rulers, there is 1 compass. For every 2 rulers, there is 1 compass.