Maths again! (the last thing!)Watch
Sorry, bout buggin u guys again! One last thing I need 2 no though! and PLEASE PLEASE PLEASE HELP! How do you draw a y=mx+c line on a scatter graph you have created? I mean, how do you work out mathmatically (but only GCSE level) where the line goes?
take two points in that line, divide the difference in the y axis by the difference in the x axis to find m. c is the point where it crosses the y axis.
But doing it by hand is rather rough in itself anyway, so best advice is doing it by excel.
Substitute in the x values and use to find the y variables. Plot these points and draw a straight line through them..