If I increase the number of bulbs, the brightness will increase
Independent variable is the number of bulbs.
Dependent variable is the brightness
All the lights a bright and shining
All of the lights are shining even when one build is taken out.
If I take one bulb out, the other bulbs will stop working.
All of the lights lit up.
None of the lights lit up.
If you want to put Christmas lights up, use a parallel circuit because if one bulb goes out, the others still work.