Answer:
The slope is 1
Explanation:
It's a remarkable slope, since it forms an angle of 45 degrees. Another remarkable slope would be an horizontal line, with a slope of 0.
Here's how to calculate it.
A slope if the variation of the y values (rise) divided by the variation of the x values (run).
So, let's take 2 points from the line: (1,1) and (-1,-1).
The variation of y values is: 1 - -1 = 2
The variation of x values is: 1 - -1 = 2
So, the slope is 2/2, or 1.