Question

In 1977, the price of a scientific calculator was $175. In 2004, the price was $15. Assuming the change in price was linear, what was the approximate price of a scientific calculator in 1998? * help please*

Answer 1

In 1977, price= 175 dollars
In 2004, price=15 dollars
Difference in no. of years=2004-1977=27 years
Change in price= 175-15=160
Or, in 27 years, price reduces by 160 dollars.
Now, 1998-1977=21 years
Therefore, in 21 years, reduction in price=(160/27)*21=124.45 Dollars (approx)

Answer 2

thanks darlling (: