the price of a certain item was $10 in 1990 and it has gone up by $2 oer year since 1990. if this trend continues, in what year will the price be $100?
Model the function as a linear equation: y=2x+10 Where y=price of item, and x=years since 1990. Plug in 100 for y. 100=2x+10 2x=90 x=45 45 years after 1990 so 45+1990 or 2035.
