Answer: -1
Remember: RISE/RUN (y/x). Lines that are increasing have a positive slope, and lines that are decreasing have a negative slope.
You can find the slope in two ways:
1. Useful if the line is graphed: count the units between 2 points on the line.
- Let's use the points (0, 2) and (1, 1).
- (0, 2) on the line is 1 unit higher than (1, 1) and 1 to the left of (1, 1).
- Because the line is decreasing, the slope is negative.
- Therefore, the slope is -1.
2. Useful if the line is not graphed: find the difference between the y-coordinate values divided by the difference of the x-coordinate values.
- Let's use the points (0, 2) and (1, 1).
- [tex]\frac{1 - 2}{1 - 0} = \frac{-1}{1} = -1[/tex]
- Therefore, the slope is -1.
