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Find the rate of change

Marcia can pack 20 envelopes in 60 minutes and 80 envelopes in 4 hours.
(Covert hours to minutes.)

User Rushee
by
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2 Answers

4 votes
she packs 20 envelopes per hour(60 minutes) i don’t know if this is correct, i’m sorry
User Charlie Drewitt
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6 votes
The rate of change is 3

60/30=3

4x60=240 minutes
240/80= 3

So rate of change is 3
User Rich Maes
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4.9k points