What scale should I use for the y and x axis

For the x-axis (Current $I$): The values range from $0.12 \, \text{A}$ to $0.64 \, \text{A}$.
For the y-axis (Voltage $V$): The values range from $0.00 \, \text{V}$ to $1.20 \, \text{V}$.

To comfortably fit all current values and allow for clear plotting, a scale where each major grid line represents $0.1 \, \text{A}$ is appropriate.
For example, if using graph paper where major grid lines are $2 \, \text{cm}$ apart:
The x-axis scale should be $\boxed{\text{2 cm represents 0.1 A}}$.
This means each small square (1 mm) would represent $0.01 \, \text{A}$.

To comfortably fit all voltage values and allow for clear plotting, a scale where each major grid line represents $0.2 \, \text{V}$ is appropriate.
For example, if using graph paper where major grid lines are $2 \, \text{cm}$ apart:
The y-axis scale should be $\boxed{\text{2 cm represents 0.2 V}}$.
This means each small square (1 mm) would represent $0.02 \, \text{V}$.