What is the slope of the line? a. 1 b. 0 c. -1 d. undefined

slope = 0

Explanation:
We can note that the given line has the following equation:
y = -1 for any value of x
This means that any point on the line would have the coordinate (x , -1)

The slope of the line can be calculated as follows:
slope = (y2 - y1) / (x2 - x1)

Now, taking any two general points on the line: (x1 , -1) and (x2 , -1), we can find the slope as follows:
slope = (-1 - (-1)) / (x2 - x1) = 0 / (x2 - x1) = 0

Based on the above, we can deduce that:
The slope of any line that is parallel to the x-axis is zero.

Hope this helps :)