change regression/poly_desc() (#684)

Author: soumith

regression/main.py

@@ -25,7 +25,7 @@ def poly_desc(W, b):
     """Creates a string description of a polynomial."""
     result = 'y = '
     for i, w in enumerate(W):
-        result += '{:+.2f} x^{} '.format(w, len(W) - i)
+        result += '{:+.2f} x^{} '.format(w, i + 1)
     result += '{:+.2f}'.format(b[0])
     return result