Which point is closest to a specific line?

__Question:__

Find the point on the line http://gauss.vaniercollege.qc.ca/web...249f9be551.png which is closest to the point http://gauss.vaniercollege.qc.ca/web...3284e71581.png.

(I am not sure if this is calculus but my course is called calculus so if it isn't please don't ban me or anything because I am not sure if you need knowledge of calculus for this or not.) I have no idea how to do this. My two attemps were using the distance formula and making d = 0 which does not work and my other attempt was plugging in either x = 2 or y = -3 and getting the other respective coordinate and that didn't work. Someone please show me what to do.

Any help would be greatly appreciated!

Thanks in advance!