A linear equation is drawn as a straight line on a set of axes. To draw the graph we need coordinates. We generate these coordinates by substituting values into the linear equation.

To animate a line graph in PowerPoint, you need to open the slide, draw the Graph add the labels and then animate the graph as explained here.

Charts are a great way to visualize large sets of data. Here's how to add a graph on Google Docs and edit it in Google Sheets.

The system also includes a ruler that serves both as a guiding edge to help you draw a straight line and as a measuring aid for length.