Hey everyone, i'm having trouble finding velocity on a straight line position/time graph. Every single equation I do ends up with a different answer, which doesn't make sense because it's a straight line. I know the equation is Vf-Vi/Tf-ti The answer to this question is 1.4m/s N Example: 45-25/28-16= 1.666666m/s Wrong answer. I'm just taking these from the graph by the way. 25-20/16-14= 2.5, completely different answer. Could someone please explain what i'm doing wrong? I'm calculating the slope which seems to change with every calculation that I do, which I understand is wrong.