The slope of AP is
and the slope of BP is .
Since both AP and BP are segments of the same line, their slopes are equal. Equating the two expressions for the slope should give you the equation of the line.
hey im stuck on this one question. its maths c1. Its got to be in 2moz.
1. The P(x,y) lies on the straight line joining A(3,0) and B (5,6). Find the expressions for the gradients of AP and PB. Hence show that y=3x-9
thanks.