a)
[1] First we would plot a point at (0, -1) for the y-intercept
[2] Next, we would go down 4 and over one, then put another point down at (1, -5)
[3] I would then draw a line between the two points, and continue it out to the edges of my graph to complete the line.
b) I would use a graphing calculator
-> See attached
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather