y = x^2 / -16 ... dy/dx = -x/8 ...sub x= -8p. so dy/dx = p = GRADIENT of P ...
y - y-cord. of P = p(gradient) [ x- x-cord of p]
y + 4p^2 = p ( x+8p)
y + 4p^2 = px +8p^2
y = px + 4p^2... Thats the equation...the question says M cuts the y-axis, therefore x=0 so sub that into equation
y =...