Do grade improvements help with college admission?

Next year, I plan on applying colleges and I was wondering if my grade improvements will still give me a chance at UC schools considering that I did reallllly bad during my freshman year.

Freshman GPA : 2.9
Sophomore GPA: 3.5
Junior GPA: 3.9

Your freshman GPA is not calculated in the UC GPA. And Yes, it looks good that you’ve made improvements.

Is this weighted or unweighted?