1. Consider a linear equation of the form y = mx + b. When the value of b remains fixed and the value of m changes, the graph rotates about the point (0, b). As the value of m increases, will the graph rotate in a clockwise or counterclockwise direction?
2. Consider an equation of the form y = mx + b. When the value of m remains fixed and the value of b changes, the graph is translated vertically. As the value of b increases, does the graph move up or down?
3. What is the difference between a line having undefined slope and having zero slope?
4. When is the x-intercept of a line the same as the y-intercept?