Answer:
Check explanation
Step-by-step explanation:
I think that you might be missing a negative in one of your values because it comes out to 0 if you put both y's as 1...
m = (y2 - y1) / (x2 - x1)
m = (1 - 1) / (2 - (-4) )
m = 0 / 6
m = 0
but if one of the ones is negative then it would be
m = (y2 - y1) / (x2 - x1)
m = (1 - (-1)) / (2 - (-4) )
m = 2 / 6
m = 1 / 3