The image of a point is given by the rule ry = –x(x, y) → (–4, 9). What are the coordinates of its pre-image? (–9, 4) (–4, –9) (4, 9) (9, –4).

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. 

Answertrue statement