Rational B.O.B

fractions, no one likes them, and that's before you start putting the alphabet in there. but it makes sense now, adding and subtracting fractions took a little while before it clicked in my mind, but eventually I understood it. wow multiplying and dividing rationals is easy, easier than I expected. It feels like reveiw when we work on asyptotes because we learned about them in algebra 2, so I understood those perfectly, except for how the line can sometimes cross the asyptote, is it supposed to be a line where the input yields an error, so how can that happen with the line going over it?