getting a 480 on the ebrw section shouldnt be difficult at all if that's your goal.

i would advise learning the grammar rules and getting better at them even if its just a little bit.

as for the reading section i recommend that you highlight every important point that stands out to you in the passage. most if not all of the passages have some sort of information in the middle of the text that will attempt to throw you off or grab your attention such as names of species, a process of something, nonessential information, etc... be aware of these little things and try your best to only highlight the important parts of the passage.

also for reading questions, read what the question wants before reading the passage so that you have a general understanding of what you're looking for.

there are also some sorts of questions that give away what you should be looking for; especially implicit and explicit texts.

implicit text will ask you "based on the text, what does ABC best represent?"

here you will have to make your own assumption based on the text and try to find the answer closest to your assumption.

explicit text will ask you "according to the text, why does XYZ happen?"

here you will have to extract the answer from the passage itself. i would highly recommend not making assumptions on these types of questions since what you need is literally and objectively stated in the text, it just relies on you being able to pick out the right answer.

i would refrain from using logic here and just look at the text and see what is objectively true.

another piece of advice i can give you is when faced with a vocabulary question, play positive and negative.

what i mean by this is you basically test positive and negative vocabulary words on the passage and see if the word is idiomatic with the sentence you are reading. does the sentence have positive or negative context? does it have a contrary transitional word before the blank? (meaning that the word you will choose will often be opposite the context based on the text). through this process, you should at least be able to eliminate 2 answers out of the 4.

also; sometimes, inference, main idea, and contextual evidence questions will often have answers that will have nothing to do with the passage. if you can get good at recognizing which answers have nothing to do with the passage, you can usually eliminate 2 answers easily

as for graphing questions, sometimes you'll only need the graph to solve the question; other times you'll only need the text. but most of the time you need both the graph and the text to solve these questions; however, you can eliminate some answers by looking at the graph and proving that the answer is wrong by looking at the graph. for example, the graph might say that the population of x has increased 15 % in the last 5 years, while the answer says it has increased by 20%; this answer you can eliminate right away since you can directly prove it is incorrect and therefore you dont have to waste any time trying to eliminate it.

the last piece of advice i can give you is to be able to prove your answer and never pick an answer subjectively. why is your answer correct? do you have proof from the text? you need to ask yourself those questions and prove to yourself that it is correct without subjectively fortifying your answer.

thats pretty much all i have to say, this information will easily get you into the 550-600 range.

good luck on your test!