New York City has decided that sodas are bad for your health. To combat this health crisis, they have decided to institute a $100\%$ tax on the cost of soft drinks $($e$.$g$.,$ a $$1\mathrm{.}50$ soft drink will now cost $$3\mathrm{.}00).$ Will this tax have the desired effect of reducing the amount of soda consumption? What additional information do you need to know to accurately answer this question?