If we recorded the average U. S. Housing Price every month for the next year, what graphical display is most appropriate to display the data?

Time plot.

Explanation:

A time plot, also known as a time series can be defined as a graphical representation of a pre-defined value (data) against time.

If we recorded the average U.S. Housing Price every month for the next year, the graphical display which  is most appropriate to display the data is a time plot.

Generally, when representing data that changes with respect to time or that are random in nature; a time plot is considered to be the most effective graphical display to use.

In this scenario, the average U.S. Housing Price that is observed should be plotted against the time of occurrence (months) over a year.