Decision trees

A decision tree is a picture that shows you what choices you can make and what will happen as a result of each choice. It looks like a tree with each branch showing a different decision you could make. At the end of each branch is a "leaf" which tells you what will happen if you take that branch. For example, if you have a decision tree that looks at whether or not it will rain tomorrow, the branches might be yes and no, and the leaves might say "take an umbrella" and "go outside without protection".