Answer:
positive
Explanation:
The slope is the inclination of the line with respect to the x-axis. It is denoted by the letter
. In mathematical language, the slope
of the line is defined as the difference on the y-axis divided by the difference on the x-axis for two different points
and
on the line:

If:
The slope is positive and the line is increasing from left to right
The slope is negative and the line is decreasing from left to right
- If a line is vertical the slope is undefined
is a constant function.
Since the graph of the linear function shown is increasing from left to right, we can conclude that the slope is positive.