Advanced Dynamic Text

Adding text

In the Edit text box the LaTeX option will format the text as mathematical and offer options for templates (such as fractions, integrals and sums).
LaTeX text boxes will also properly format objects selected using the GeoGebra icon in the Advanced menu.
LaTeX should be selected when the Text box is first created.

Try adding some text boxes for the equation of the line and fractions for the gradient on the example below.