For this Activity, create a graph and make the forecast described.

Create graph:

Use one series of data $($one line$)$ over the entire $3$ year period. Make sure the month$/$year is displayed on the $x-$axis. Use good graphing techniques.

Make a forecast:

Determine the annual regressign forecast for $2020.$ See tab labeled "Regression."

Determine the seasonally adjusted forecast for Jan $2020.$ This will require you to calculate the seasonal index for Jan $2020.$ Then adjust the annual regression forecast that you made for $2020$ into a seasonally adjusted forecast for Jan $2020.$

Comment about why this forecast is an appropriate model or not. Use information from the various steps$/$questions above.