1) Distance Formula
You can calculate the distance between two points in a Cartesian plane by using the following formula.
where d = distance, P1 and P2 are the two points with co-ordinates (x1,y1) & (x2,y2).
Use this formula to calculate the distance between your points on your treasure map, rather than measuring the distance with a ruler.
Use this formula to calculate the distance between your points on your treasure map, rather than measuring the distance with a ruler.
2) Longitude and Latitude
Investigate what latitude and longitude are and redraw your treasure map using the correct latitude and longitude numbers for this area on your axes. Recalculate your straight line equations with these new figures. Use a GPS to check for accuracy.