Change line distance by moving start point

If i have a line and want to change its length without changing the position of its end point, how can i do that? Is there a way to change the length of a line by changing the position of its starting point along a vector?

U should upload your file and screenshot for anyone to help you.


there are multiple possibilities:

A.) extend the line with "extend curve"
B.) create a new “line sdl”, retrieve the vector from your initial line and use the end point, set length
or C.) create a new "line ab" , startpoint = endpoint + (unitized and length multiplied vector)