A-math

let the x- intercept and y- intercept be ( a,0) and ( 0,a)
The equation will therefore be
(0-a) / (a-0) = (y-(-2) ) / (x-2)

After solving you will get:
-x+2=y+2
in general form it will be
x+y=0

let m be the slope of required eqt.
y + 2 = m(x - 6) ---------------- (1)

y-intercept = -6m - 2
x-intercept = 2/m + 6
-6m - 2 = 2/m + 6
simply,
m = -1 or m = -1/3

代返入 (1), 掂