A 3.0kg model train going right at 2.8m/s bumps into another 2.0kg model train in the same direction at 1.6m/s. The heavier train has a final speed of 2.2m/s to the right. What is the final speed of the lighter 2.0kg train car?

There is no graph to look at on here, but i shall explain them to you. a line graph is just in its title it’s a graph with a line running through the dots to show an increase or decrease. a bar graph is used to show how much or how little something is so a comparison. a scatter plot is used to graph points to tell the data. and i don’t know what a histogram is.