I have a problem with an acceleration lab im trying to write up. i came up with the following values for my points. time (seconds) = 0, 0.05, 0.15, 0.25, 0.35, 0.45, 0.55, 0.65, 0.75, 0.85, 0.95 average velocity (cm/s) = 0, 36, 78, 108, 143, 138, 249, 235, 278, 301, 334 when plotting the line of best fit for the graph (as suggested by my teacher) i found the line did not cross at (0,0). this was mentioned in my class as something that should happen. what is the source of error that would cause this line to cross the y-axis above the origin, if the starting values were both zero? noone in my class knows PLEASE HELP! DESPRATE!