The SLOPE of a line is a number that tells us how steep the line is. [br]To interact with applet, [b]move the 2 [color=#1551b5]BLUE POINTS[/color] anywhere on the screen[/b] you'd like. As you do, take note of the displayed slope. [br][br]See if you can figure out how the slope of a line is calculated just by looking at it. [br]After interacting with this applet for a few minutes, take another few minutes to carefully answer the questions that follow.

Questions:[br][br]1) There are four types of slope: Positive, Negative, Zero, and Undefined. [br][br] What causes a line to have POSITIVE slope? Explain as best as you can. [br] What causes a line to have NEGATIVE slope? Explain as best as you can.[br] What causes a line to have ZERO slope? Explain as best as you can. [br] What causes the slope of a line to be UNDEFINED? Explain as best as you can.[br]