What piece of information does c identify in the following equation y= ax^2 +bx +c

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

The parabola opens: y=√x-4 (principal square root) up down right left

Graph y = -|x| + 2. click on the graph until the correct one appears.