###### Example4.8.16

Let $$x$$ represent the price of a new $$60$$-inch television at Target on Black Friday (which was $$\650$$), and let $$y$$ be the number of hours you will watch something on this TV over its lifetime. What is the relationship between $$x$$ and $$y\text{?}$$

Well, there is no getting around the fact that $$x=650\text{.}$$ As for $$y\text{,}$$ without any extra information about your viewing habits, it could theoretically be as low as $$0$$ or it could be anything larger than that. If we graph this scenario, we have to graph the equation $$x=650$$ which we now know to give a vertical line, and we get Figure 4.8.17.

in-context