For this case we will describe three different ways of naming a line. 
 Way 1: 
 If we have the following points:
 P = (x1, y1) 
 Q = (x2, y2) 
 Points where the line passes, then we have the name of the line is: 
 Line PQ 
 Way 2: 
 Suppose we have: 
 m: slope of the line 
 b: cutting point with the y axis. 
 The equation of the line is: 
 f (x) = mx + b 
 The name of the line will be: 
 Lineal funtion 
 Way 3: 
 Another name of the line, we can obtain it using the definition: 
 line = Continuous succession of points.