Answer:
y = 0
Explanation:
This line has a y-intercept of 0: (0, 0). Thus, the equation of this line has the form y = mx + 0, or just y = mx.
As we move from (-3, 0) to (0, 0), x increases by 3 while y stays the same.
Thus, the slope of this line is m = 0/3, or just 0.
A line with a slope of zero is horizontal.
Knowing that this line passes thru (0, 0), we conclude that the equation of the line in question is y = 0 (which is the x-axis).