The number of pages the printer can print and time are directly proportional. If we let x be the number of pages and t the time, this direct variation may be mathematically expressed as,
x = kt
where k is the constant of variation.
Substituting the given to the equation,
30 = k(2.5) ; k = 12
Solving for the number of pages printed after 5 minutes,
x = (12)(5) = 60
Thus, the printer can print 60 pages in 5 minutes.
