The y-intercept of a graph is the point where the graph intersects the y-axis.
From your description, it seems like you provided a set of numbers that may represent coordinates or points on a graph. However, to determine the y-intercept, I would need a clearer representation of the graph itself or a specific equation.
If the information you provided states that the y-intercept is -1, then that would mean the graph intersects the y-axis at the point (0, -1).
Please provide more context or clarify your question if you need a more detailed analysis!