Update README.md

Signed-off-by: Fabiana 🚀  Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

README.md

@@ -244,6 +244,9 @@ The **graphical method** for solving simple linear programming (LP) problems inv
 
 ## Steps to Solve Graphically
 
+1. **[Plot the Constraints](0:** For each constraint, treat it as an equality and plot the corresponding straight line on the Cartesian plane (\(x_1\) on the horizontal axis, \(x_2\) on the vertical axis).
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