Which type of lines match these equations (2/3)x =(5/3)y
2x-5y=0

This equation is a linear equation. They form straight lines. In this case, the line goes through the origin of a cartesian plane. It can be rewritten as
y = 2/5x. 
The graph looks like this:

The year before the 10s so it was like when caveman were alive

It will be a whole number.