Final answer:
The icon to create a new expense transaction is typically the plus sign inside a circle icon. It signals the ability to add a new item, in this case, an expense.
Step-by-step explanation:
The icon that allows you to create a new expense transaction is usually represented by a plus sign inside a circle icon. This icon is commonly used in software applications to indicate the addition of a new item or task.
When you click on this icon, it typically brings up a form or dialogue box where you can enter the details of the new expense transaction, such as the date, amount, category, and any notes.
The bell icon is usually associated with notifications, the question mark icon often represents help or information, and the magnifying glass icon is usually used for search functions.