Answer
m = 1
Step-by-step explanation
Simple Method: Rise (go up) over Run (go left or right)
Start from a perfect point then rise and run.
Rise: 3, Run: 3 = 3/3 = 1
Alternatively, you could pick two points and use the formula y2 - y1/x2 - x1
Just as an example, I will choose (-2, -3) and (2, 1)
plug in:
1 + 3/2 + 2 = 4/4 = 1