Whenever I teach Algebra, it seems that I spend a tremendous amount of time making sure that my students can write the equation of a line given pretty much any combination of information: the slope and y-intercept, or a point and the slope, or two points.
But inevitably, when I get a new batch of students in my Geometry classes the next year, even those I taught the year before seem to have no idea how to write the equation of a line!
I wrote this worksheet in response to the fact that lectur