With all these different types of line equations, how do I actually tell if an equation is a line or not?
This is a really good question. Usually it’s linear relationships (line equations in other words) that are the first type of relationship that you learn about when studying algebra. If you haven’t seen many other types of equations then you probably have very little to compare them to, so it can be difficult to see what it is that makes a line equation a line equation. Continue reading What is a line and what isn’t?