Equations of straight lines and graphs of linear equations. Know how to obtain an equation of a straight line given two pieces of information, for example, two points, or a point and slope. Intercepts lead to special cases of points.
Let $L$ be the line through the points $(1,-2)$ and $(-2,-3)$. The slope of $L$ is . Using $x$ and $y$ as the variables as usual, its equation in slope intercept form is $y=$ . The $x$-intercept of $L$ is $x=$ .