Chapter 2 Linear Equations and Functions - 2.3 Graph Equations of Lines - 2.3 Exercises - Skill Practice - Page 94: 56

The steepness when $m>0$ is greater as $m$ increases. The steepness when $m<0$ is greater as $m$ decreases.

Graph the equation $y=mx$ for $m=-3,-2,-1,1,2,3$. We notice that the lines with $m>0$ lie in Quadrants I and III; when $m$ grows, the steepness grows, and the line gets closer and closer to the $y$-axis. When $m<0$, the lines lie in Quadrants II and IV; when $m$ decreases, the steepness grows, and the line gets closer and closer to the $y$-axis.