Answer:
y = x - 3
Explanation:
we can write this is slope-intercept form, y=mx+b, where m is teh slope and b is the y-intercept. We can see that the line is a straight horizontal line, with no change in the y-axis, so it has a slope of zero. We can then ignore m in the equation. We can also see that the line intercepts the graph at (0,-3), so the y-intercept is -3. Substituting into the equation, we then have y = x - 3.