To find the x-intercept of the graph, we need to find the point where the line intersects the x-axis, which means y = 0. We can substitute y = 0 into the equation 2x - y = -6 and solve for x:
2x - y = -6
2x - 0 = -6
2x = -6
x = -3
Therefore, the x-intercept of the graph is -3.