Over which interval is the graph of f(x) = one-halfx2 + 5x + 6 increasing? (–6. 5, [infinity]) (–5, [infinity]) (–[infinity], –5) (–[infinity], –6. 5).

I’m gonna guess without the picture to influence people to join the army

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

It’s according to the question. but most of the time the answer is b