Transistors switching

this is the set up

This is our initial set up, but for the next step we will use our fingers instead of the the wire connecting the led and the resistor

Here's the data collected 

We can observe in the graph that the two currents are directly proportional forming a linear function. That means that when one increases the other increases as well. 

We found beta by applying the following equation beta=(a2/a1) -1 and we got 5 miliamps and we see that the currents doesn't saturate because the potentiometer prevents that of happening