Question 176277
I will do part a) for you.  If you have a point (x1,y1) and a slope m, the equation for the line is
(y-y1)=m(x-x1)
So here, with a point of (6,2) and a slope of 2, we have
y-2=2(x-2)
So
y-2=2x-4
and thus
y=2x-2