Dependent sources and MOSFET & Resisters an Ohm's law LAB

Resisters and Ohms Law voltage current characteristic lab:  In this lab we measured several combinations of voltage and current for a resistor and plot the resulting voltage-current characteristic curve measured for the resistor as showen in the below graph and data table. 

We compared two parallel lines on Voltage vs I graph. both lines says that at zero current their voltage is different.

In MOSFET lab a  simple voltage controlled current source is constructed and tested. we built and tested a circuit which acts as a Voltage Controlled Current Source

Graph of the voltage vs current and table is showen in below & above picture. Graph is just a straigh line.