is summation linear in a passive membrane?

2018-02-19 03:37:08

I'm not too sure what it means for summation to be linear? im running a simulation and as i decrease time for the second EPSP the amplitude decreases, does summation being linear mean that there is a direct negative linear relationship between delay of onset and amplitude? also noticed there is no change when i double or triple my conductance value

Im just not too sure what the relationship is telling me