To check Expense report as a Graph, please follow the below mentioned steps:
Step 1 : Click on Insights in the Left side tool bar.
Step 2 : Click on Total Expenses.
Step 3 : Select the Date range for which you would like to see the overview.
Step 4 : Hover the cursor on the graph on any particular date. You can see the total value of Expenses document created for the hovered date. The transaction number shows the number of expense documents created.