SOLUTION: in 1990 a 4-function calculator cost $45. in 1995 a 4-function calculator cost $5. find the average rate of change in the cost of calculators in dollars per year.

SOLUTION: in 1990 a 4-function calculator cost $45. in 1995 a 4-function calculator cost $5. find the average rate of change in the cost of calculators in dollars per year.

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Question 983755: in 1990 a 4-function calculator cost $45. in 1995 a 4-function calculator cost $5. find the average rate of change in the cost of calculators in dollars per year.
Answer by macston(5194) (Show Source): You can put this solution on YOUR website!
For 5 years from 1990-95 the change was -$40,
the average rate of change was -$40/5yrs = -$8/year

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