Sheree’s brother gave samuel his collection of stamps when she left for college. at that time, the value of the collection was $

Question

2 years ago

5

420. eight years later, the stamp collection was worth $980. what is the rate of change?

1 answer:

AlekseyPX · Answer 1 · 2023-10-25T01:52:48+03:00

The rate of change of stamp collection was $57.5 per year.

Rate is comparison of two related quantities.

Often the second quantity is time (per second, per hour, etc) but it can be anything.

Can be in the style "this per that" or as a single number calculated using division.

Example: Sam makes 3 pancakes every 6 minutes, that is a rate of:

• 3 pancakes per 6 minutes

• 0.5 pancakes per minute

• 30 pancakes per hour

• an hourly rate of 30

By formula the rate of change = Change in cost/ Time taken

=( $980 - $420)/ 8years

= $460/ 8 years

= $57.5 per year

Thus the rate of change of stamp collection was $57.5 per year.

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