10% either side of 60% (about 31°) makes the minimum slope 54% (about 28°) and the maximum slope 66% (about 33°).
Answer:
If your saying that 15 is m (or the slope) I can help you there to find the equation (y=mx+b form), but i will need more detail, type more details in the comments below and ill help you from there.
B is the correct answer. The absolute value of something will always be positive. ALWAYS.
