A vertical line is one the goes straight up and down, parallel to the y-axis of the coordinate plane. All points on the line will have the same x-coordinate. In the figure above, drag either point and note that the line is vertical when they both have the same x-coordinate. A vertical line has no slope.
Cursor/ Insertion PointCursor/ Insertion Point: The cursor (also known as the insertion point) is a flashing vertical bar on the screen that indicates where entered text or objects will be placed in the document.
Whenever you see a flashing vertical line—called the cursor—you can start typing. Note that the mouse pointer is also called a cursor, but it is shaped differently. The keyboard cursor is also called the insertion point. The blinking symbol on the computer screen is called the cursor.
The insertion point is the blinking vertical line in your document. It indicates where you can enter text on the page.