Both graphs are done by Lenicha in Excel. Good job!
Just one observation. In the graph below, points are precisely placed on a parabola (trendline option of a second-degree polynomial). That suggests a question about the graph above, which presents quite scattered points. The only reasonable explanation is in the launching method; the launcher equipped with a rubber band might not be the best solution.
Both graphs present a good start-point for further discussion in class.
