Aprinter outputs 30 pages in 120 seconds. write a proportion that relates pages in 120 seconds to output y pages in x seconds

Assuming the printer is working at a direct proportion (and not inverse)

30 pages = 120 secs

(divide by 10)

3 pages = 12 secs

(divide by 3)

1 page = 4 secs

so 1p (is directly proportional to) 4s

the formula for direct proportion is

y ∝ kx

where y = the number of seconds and
where x = the number of pages

therefore if y = 4 and x = 1
then k = 4

meaning that the final proportion in
y = K x

where y = the number of seconds and
where x = the number of pages

(or you could write it as ... Sec = 4 x Pages)

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