First, you must rule your graph paper like a general. Choose a scale so your plot commands the page, and always ink your axes with a clear, bold title. The best-fit line is a judgment call, not just connecting dots—it should ignore the rogue point trying to cause trouble. Finally, calculate the slope using two points far apart on that line, not your original data. I learned this the hard way in my physics practical, while my grandfather explained it with the same patience he uses to teach my cousin ragas on his esraj, saying even a steady hand must sometimes ignore the discordant note to find the true tune.
#exams#study
Jump in to reply — no account needed.