[4.6 UI] What method do I need to call from the gameObject to modify a Text UI?

I've declared this at the top of the script

1. publicGameObject scoreText;

In the editor i've dragged the Text UI element into this gameobject slot i created (im sorry i am fairly new and don't know what these boxes would be referenced as)

So now that i have the Text UI element as a game object, i want to modify the text in the script.

I have a function to keep score

[4.6 UI] What method do I need to call from the gameObject to modify a Text UI?