Final answer:
To raise a GPA based on the given equation, a student should concentrate on not missing classes and increasing study hours, as these factors have the most significant weight in the GPA calculation.
Step-by-step explanation:
The question essentially asks how to raise one's GPA based on a given equation that incorporates combined SAT score, class attendance, and hours spent studying. According to the equation, GPA = 0.25 x combined_SAT + 0.25 × class_attendance + 0.50 × hours_spent studying, we can determine that studying more has the greatest impact on increasing the GPA since it has the highest weight of 0.50 in the formula. To improve GPA, a student needs to focus on not skipping classes and increasing their study hours, as the SAT scores are fixed and presumably already taken by college students. This approach aligns with the understanding that academic performance is influenced by consistent attendance and dedicated study time, with implications for students wishing to transfer or meet certain GPA requirements.