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a.Show gradient is - 3/2

-1-5 = -6

6-2 = 4

= -3/2

Hence find the equation of the line AB with answer in form Ax + By = C

A B C are integers.

- now this isn't a homework question im just doing some extra work in my own time. I have never been taught this, but when looking through past papers i have seen that it has actualy come up, can someone explain to me how exactly you do these. I have attempted it, and know the answer because i have the mark scheme, but i don't 100% understand it.

i know you use y-5 and y+1 somewhere, which is the inverse of the Y coordinates in the 2 points im given. and i know that you somehow times the X by the gradient with those coordinates inverted but im not sure how it works.

answer = 3x+2y = 16 can anyone explain this?