Question

Question #6d1ab

Answer 1

I would take the volumes of ten different solutions.

These are separate measurements, not influenced by one another.
On the `x`-axis we would see number 1, 2,... 10. In no logical order.

The others are more time-related, and should be graphed by a line.
The `x`-axis would show a continuous time-line, and you would try to connect the measurement dots by a nicely fitting line or curve.