Two student groups are working on the school yearbook. They printed two batches of pages on a printer in the computer lab. The table below shows the
number of pages printed by each group and the time needed to print the pages.
Time( in seconds ), x
30 and 25
Numbers of pages, y
150 and 130

Which statement describes the relationship between the data?
A. The data represent a proportional relationship, and the constant of proportionality is 5.
B. The data represent a proportional relationship, and the constant of proportionality is 5.25.
C. The data represent a proportional relationship, and the constant of proportionality is 5.5.
D. The data do not represent a proportional relationship.