©G Dear 2010 – Not to be sold/Free to use Applied Mathematic (Preliminary Extension 1) Straight Line Graphs Gradient given two points Stage 6 - Year 11 Press Ctrl-A ©G Dear 2010 – Not to be sold/Free to use

Gradient between two points Find the gradient between (1,1) and (4,3). y m = y2 – y1 x2 – x1 4 (4,3) = – 3 1 3 4 1 2 1 = 2 3 (1,1) x -3 -2 -1 1 2 3 4 -1 -2 End of Slide

Midpoint Formula -2 -3 Use the Midpoint formula to find the midpoint between (-3,-2) and (3,4). y m = y2 – y1 x2 – x1 (3,4) 4 = – 4 -2 3 3 -3 2 1 = 6 = 1 x -3 -2 -1 1 2 3 4 -1 -2 (-3,-2) End of Show