Answer:
Step-by-step explanation:
Remark
All you need is 2 points that you can rely on as being accurate.
(2,0) should certainly be one of them. I would pick (-1,3) as the other but it is less certain.
Givens
y2 =3
y1 = 0
x2 = -1
x1 = - 2
Formula
m = (y2 - y1)/(x2 - x1)
Solution
m = (3 - 0) / (-1 - - 2)
m = (3 )/ (-1 + 2)
m = 3/1
m = 3