Which of the following is considered a good email subject line?

A good email subject line should be clear, informative, and specific to the content of the email. The option that states "Due dates for notes on Finite Math, Chapter 1" effectively conveys the purpose of the email and what the recipient can expect. It specifies the subject of the email—finite math—and identifies that it relates to due dates, which is likely to grab the reader's attention and indicate its relevance to them.

In contrast, "Important: Please Read" is vague and does not provide any specific information. While it attempts to create urgency, it lacks context that would allow the recipient to understand what the email is about at a glance. "Hi!" is too informal and non-descriptive, failing to communicate any relevant information regarding the email's content, making it less likely the recipient will prioritize reading it. Lastly, "Question about class" is somewhat generic and doesn't specify which class or what the question pertains to, making it less effective compared to the chosen option.