Double batteries = Double volts and amps?

Question: Does doubling the number of batteries double the amps and volts?

Methods: For this experiment, the Circuit Construction Kit (DC Only) was used to explore the effects of adding batteries to a complete circuit. I used three wires, one light bulb and two batteries for each circuit. I kept the length of the wires constant.
Hypothesis: My hypothesis is that both the amps and volts will double if the number of batteries are doubled. Figure 1. 1 battery in each circuit.
Figure 2. 2 batteries in each circuit.
Figure 3. 4 batteries in each circuit
Observed Data:


Answer: Yes! My answer was correct. If you double the number if batteries both your amperage and voltage will also double.