When calculating the gradient of a line in PAPER 6 a mark is given for drawing a triangle 'more than half the length of the line'.
The examiners report also refers to the TRIANGLE METHOD alot. What is this method/how does it work.
The only way I know to calc. a gradient is using (y2-y1)/(x2-x1).
you get your straight line by plotting the points
then draw a triangle such that the line is the hypotenuse of a right angled triangle (if that makes sense?)
the triangle should be big so i recommend that you use the first and last point
basically it's rise over run which gives you the same answer ans (y2-y1)/(x2-x1)
Hope this helps
h