The following would draw a vertical line 30 units in length from a previously defined point given as 30,50? (a) 60,50 (b) 30,80 (c) @30,0 (d) @30<0

the answer is C thanks for invite

I think option C ----------------

Option C is the correct answer.

 Thanks for the invite and  the answer Selection C

Another way we previously selected point and draw a vertical line line order size 30 units

 happy new year Ramadan Kareem

Answer is: option (c) @30,0

Thanks for the invite. Sorry, the question is out of my field.

b) 30,80

This method is called Absolute Method (X,Y) in which we need to give X and Y distances.

Thank you for the invitation

Option C

With greetings and appreciation

With all due respect to the fellows, but the question it about to draw a "vertical line" for that option (a), (c) and (d) unfortunately will make you draw a horizontal line with 30 units in length.

the only option that will make you draw a vertical line is option (b) for AutoCAD 2D being programmed X, Y vector as horizontal, vertical movement respectively

to elaborate on that you will find the given first point is 30 in X-Axis and 50 in Y-Axis; for that, to move vertically you need to fix the X-Axis and increase Y-axis with 30 units.

hope that this comment explain it well

Thank you for the invitation

I agree the option  C