I don't understand the positioning of a line in the svg tag

Question

width, height, x1, y1, x2, y2.

Answer 1

https://code.sololearn.com/W130vVZ0VO9q/?ref=app

Answer 2

Always remember the Coordinate Graphing method.
x axis = horizontal line
y axis = vertical line
x1/y1 is your starting point and x2/y2 is your ending point.
hope this helps. keep practicing. :)