## Real World Applications – Algebra I

### Topic

Calculating your GPA

### Student Exploration

One of the most useful ways of using inequalities is calculating GPA. Many students use this as they’re figuring out which university or college they want to attend, and looking at their requirements.

You can use this college’s website to learn how to calculate your GPA: http://web.williams.edu/registrar/records/gpa.html

Upper division high school students can use inequalities to help them calculate what grades they need in some of their classes to raise their GPA. Let’s first look at one student’s grades and see if they’re eligible to attend a California State University (CSU). The required GPA for a CSU is 3.0. In the first two years, this student received the following grades:

When calculating GPA, we’re only using Semester grades. Try calculating this student’s grades on your own, using the numbers listed on the website. For the sake of applying for a 4-year university, let’s also not include grades from Advisory.

For

For

Total GPA:

Using this information, we can calculate the types of grades that this student would need in order for him to be CSU-eligible. We can use the same setup to calculate these grades. So far, this student is not CSU-eligible, based on his grades. Let’s see what his grades in

For

Total GPA for all three years:

If this student had all B’s in his

Total GPA for all three years:

This means that this student’s GPA for

### Extension Investigation

If you are high school student, practice calculating what grades you should earn in order to get a minimum requirement GPA to get into a particular university of choice. Look on the university’s website! Each university’s requirements are different!