Posted by markmorse@nocharge.com (66.109.194.217) on October 03, 2003 at 21:12:00:
In Reply to: need help graphing! posted by on October 03, 2003 at 17:01:41:
You didn't mention anything about what you know about graphing. Can you plot the point (-2,-4)?
Do it. Next, we need to find the coordinates of another point on the line. The slope will help us find these coordinates.
We can think of slope as rise over run. "Rise" is vertical movement, and "run" is horizontal movement. In other words, if we start at some point on the line, movement to another point can be described as a combination of some horizontal movement with some vertical movement.
With the slope 2/3, the rise is two units and the run is three units. This means that if we move 3 units to the right (horizontally) from some point on the line, then we will need to move 2 units up to get back to the line.
Start at the point (-2,-4). The run is three units to the right. If we start at -2 and move three units to the right, we end up at 1. The rise is two units up. If we start at -4 and move two units up, we end up at -2. Therefore, another point on the line is (1,-2).
Plot this point and then draw the straight line through the two points.
Let us know if you need more help with this. Tell us what part(s) you don't understand.
~ Mark