Answer:
y = -2x
Step-by-step explanation:
The line intercepts in point (0,0) so in the equation: y = mx + b, the b will be 0 (or gone).
Basically the equation would be:
y = mx
You only need the m or the slope of the line.
To know this, just count the rise/run from two points.
I chose two points given: (0,0) and (4,2)
From (0,0) to (4,2), you rise up by 4 and go left by 2 (negative 2 because it is going left).
rise/run
4/-2 = -2
m = -2
So the equation would be y = -2x
