Question

why do we care to perform the worst case, practical worst case, and best case performances of a line? so that we can identify which type of line we are evaluating i really dont know it allows us to bracket the behavior and gauge the performance of a real line so that we know what our lines could run like if we are ever asked

Explanation:

Analyzing worst - case, practical worst - case, and best - case performances helps in understanding the full range of possible behaviors of a real line. This 'bracketing' allows for a more comprehensive evaluation of its performance.

Answer:

It allows us to bracket the behavior and gauge the performance of a real line