[O.B.Left]

When a hitter takes the club away from address,what is the correct procedure ?I take the back in a straight line from the ball.
Not sure if this is correct.

If you mean visually straight back, as in the club head travels straight back from the ball. Then no, not correct. This would be "covering" the plane line and above the plane.

Ideally the club shaft in start up, travels the shaft plane, the club head moves back, up and in or on an arc visually and an extension of the club shaft would point at the straight base line/plane line. A hitter uses "angled" hinging.

Use the search function, much info here. Try "flashlights", "covering", "angled hinge", "tracing" , etc etc etc . See the videos.