You want to make a simple graph that shows if there is a pattern to the two sets of scores.

First, you arrange your data in columns - Like This:

1. You pick one column for X (for the X axis).
   X is usually the score used to predict SAT.
   
   
2. You pick one column for Y.
   Y is usually the score you want to predict GPA.
   
   
3. Draw a graph (really - we use computers now!).
   Draw an X and Y set of axes.
   
   
4. Plot the points.
   Each SAT and GPA pair makes an (X/Y) pair