change nat2avaMOS

local/convert_metrics.py

@@ -4,7 +4,9 @@ import matplotlib.pyplot as plt
 # Natural MOS to AVA MOS
 
 def linear_function(x):
-    return 8 * x - 8
+    m = (4 - 1) / (1.5 - 1)  
+    b = 1 - m * 1  
+    return m * x + b
 
 def quadratic_function(x):
     return -0.0816 * (x - 5) ** 2 + 5