How to create visual forecast

[allier]

I have the following data and would like create a forecast to provide my development team with a heads up on the number of users I expect to hit our server. Does anyone know how to easily do this? Appreciate the help!

Data of multiple programs:
Program Start Date
Program End Date
Forecast of Daily Users

I would like to create a line chart that shows the sum of forecasted daily users across all programs:
x-axis: time
y-axis: number of forecasted users

Thank you!

[Andy Pope]

maybe something like this.

A line chart with dates in first column.