Complete the following steps to specify the data for your graph.
A manager tracks the number of calls that sales representatives at 2 call centers receive during two stages of an advertising campaign. Each day, the manager records the number of calls for each call center in the Center 1 and Center 2 columns and identifies the stage of the campaign in the Stage column. The Y variable is Calls and the group variable is Stage. The manager also enters the dates in the Date labels column to use as the time stamp.
|Center 1||Center 2||Stage||Date labels|