Final answer:
To give another name for line b, one would refer to other points the line passes through or use endpoints or identified points labeled on a diagram, as lines in geometry are often named by the points they connect.
Step-by-step explanation:
To give another name for line b, one would typically refer to other points that the line passes through. In Cartesian coordinates, a line is often defined by an equation such as y=mx+b, where 'm' represents the slope of the line and 'b' represents the y-intercept. For instance, if line b passes through points (2,3) and (4,7), you can rename it based on these points, such as “line b through points (2,3) and (4,7)”, or using the single-letter labels commonly used in geometry, you might call it line PQ, where P and Q are points on the line.
From the given context, if there is a diagram associated with the problem, one might also provide a name based on the diagram's labels for the endpoints or other identified points on the line. If no other context is given, it's not possible to give a specific alternative name without more information.