I had a pretty tough schedule this semester, so I'm getting my first B. I otherwise wouldn't be too sad, but I hear Linear is pretty important in upper-level physics and astronomy. So, will this hurt my chances of getting into grad school? I am (was? rising sophomore) only a first-year, and I do have other stuff that might make up for it - I did research that semester, and I have an REU coming up this summer - but I honestly have no idea how my academic performance grades-wise is gonna affect my chance of getting into a great PhD program. Since a doctorate is part of my future plan at this point, I'm a little concerned. Should I be?