How do I get to know about coordinates while making svg in html

Question

https://www.sololearn.com/learn/HTML/2200/
I am on svg portion (in html course) and I am eager to make different drawings by polyline but I don't know how to make points
I basically want to understand how to determine which coordinate is which place on website

Answer 1

https://www.w3schools.com/graphics/svg_path.asp

Answer 2

the coordinates work in this way:
x axis is horizontal. Leftmost is 0. Increase rightward.
y axis is vertical. Upmost is 0. Increase downward.
Here is my SVG tutorial series :
https://www.youtube.com/playlist?list=PLkqwj9vc20pUecBQFYpSAOhTNUrvwOLBR