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The price of apples went from $0.30 per lb to $0.90 per lb in three years. Find the rate of change of the price of apples.

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1 vote
90c-30c=60cent change

60cents/3years=20cents/year

It changed 20cents a year
User REALFREE
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Answer:

Hence, the rate of change of the price of apples is:

$ 0.20 per year.

Explanation:

Let P denote the price of apples.

It is given that the initial price of apples is: $ 0.30 per lb.

i.e. P(0)=$ 0.30 per lb.

Also, the price of the apples after three years is: $ 0.90 per lb.

i.e. P(3)=$ 0.90 per lb.

Hence, the rate of the change of the price of apples is calculated by:


Rate\ of\ change=(P(3)-P(0))/(3-0)

Now on putting the value in the formula we obtain:


Rate\ of\ change=(0.90-0.30)/(3-0)\\\\\\Rate\ of\ change=(0.60)/(3)\\\\\\Rate\ of\ change=0.20

The rate of change is:

$ 0.20 per year.

User Dinero
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