Find an equation of the line having the given slope and containing the given point. Then graph the line passing through the given point and having the given slope. Solve for y.

m=0​, ​(0​,-1​)

Since the slope is 0, the line will be a horizontal line.

The equation of a horizontal line is y = b, where b is the y-coordinate of any point on the line.

In this case, the line passes through the point (0, -1). So, the equation of the line is y = -1.

To graph the line, plot the point (0, -1) on the coordinate plane and draw a horizontal line passing through that point.

Graph:
```
|
-1| ●
|__________________________________
0 1 2 3 ...
```