Linear Equations
Postivite and Negative Slope
Example 1  Positive slope
y = Â½ x + 1
x 
y 
0 
1 
1 
1Â½ 
2 
2 
3 
2Â½ 
4 
3 
Example 2  Negative slope
y = Â½ x + 1
x 
y 
0 
1 
1 
1Â½ 
2 
0 
3 
Â½ 
4 
1 
Notice the y intercept is the same, i.e. 1, for our first
two examples. The only difference between the two
equations is the slope, and not the â€˜+1â€™ on the end.
Note the slope of the line is the same anywhere you look; you can measure the rise and
the run anywhere on the graph. Anywhere you look, when you look at rise Ã· run, you get
the same slope.
Can you think of examples of a negative slope?
