Answer:
First, plot points A & B on a graph.
Collinear just means 3 or more points in a straight line (because just 2 points are always collinear, since a straight line can always be drawn through two points.
The instructions don't state a specific area in which points C & D have to be in, so you can put them anywhere, as long as they are collinear with each other, but not any other points,
So let's make up some points for C & D that are on a straight line.
Here are some points that you can choose from:
For "F" just pick a set of coordinates off to the side and label it
You can even use half values if you want:
As long as your plotted points meet the criteria: