* School policy: Each school district and even individual schools have their own policies regarding grade promotion. Some might have stricter standards than others. They might require a certain overall GPA, or they may consider extenuating circumstances.
* The grade in other classes: If you fail one honors class but maintain passing grades in all your other classes, your chances of promotion are much higher.
* School's remediation program: The school might offer tutoring or summer school to help you improve your grade. Successful completion of this remediation could be a condition for promotion.
* Individual circumstances: If there are mitigating circumstances (e.g., a serious illness or family emergency) that affected your performance, the school might be more lenient.
In short, you should talk to your counselor or a school administrator to understand your school's specific policies and what options are available to you. Don't wait until the end of the year to address the issue.