Which of the following are the correct properties of slope? Check all that apply. A. Lines that go up from left to right should have a positive slope. B. The slope of a steep line with a positive slope should be bigger than the slope of a flat line. C. The slope of a steep line with a positive slope should be smaller than the slope of a flat line. D. Lines that go down from left to right should have a negative slope. E. Lines that have positive slopes and are equally steep should have the same slope.