1. The points A, B have coordinates (-1,2) (8,5) a) find gradient of AB I did this and got 1/3 b) find the equation of AB I got y-2=1/3x-(-1) c)The line AB is extended to the point C so that B is the midpoint of AC. Find the coordinates of C
because B is the midpoint of AC, you know that AB=BC, so AC=2AB. You take the vector AB, which is (9,3), multiply it by 2 to get (18,6) and add it to A.
Alternatively, you can just add (9,3) to (8,5) for the same effect.
because B is the midpoint of AC, you know that AB=BC, so AC=2AB. You take the vector AB, which is (9,3), multiply it by 2 to get (18,6) and add it to A.
Alternatively, you can just add (9,3) to (8,5) for the same effect.
oh god, is that it? Thanks so much, I have no idea why I struggled with finding the coordinates so much