The correct response is:
The slope is positive because the line increases as you move from left to right on the graph.
This is because a line with a positive slope rises as it moves horizontally from left to right, indicating that as the x-coordinates increase, the y-coordinates also increase. In this case, the line passes through the points (0, 0) and (6, 6), which shows that as you move from (0, 0) to (6, 6), the y-value increases along with the x-value.