Finding the Y coordinate with the X coordinate
OK so this is a bit confusing to explain for me, so I drew a little diagram:
Say we have someone walking up a hill, but only know:
-Their X coordinate
-The X/Y of the bottom of the hill
-The X/Y of the top of the hill
Could someone give me a little equation to find their Y coordinate?
Sorry if this is painfully obvious, but I do not have a very good math background. Also, sorry if this is in the wrong forum.