The following expression gives an approximate value of the total average credit card debt in a U.S. household (in dollars) $\displaystyle {t}$ years after 1995.

$\displaystyle {391}{t}+{5540}$

Use this expression to predict what the total average credit card debt was or will be in the year 2019.

Answer: In the year 2019, the total average credit card debt for a U.S. household will be (or was) dollars.

Hint: The key here is to keep in mind that $\displaystyle {t}$ is years since 1995, not the actual year