How to have a minimum value higher than 0 using chart editor

Okay, so I thought it did this automatically based on the lowest point on, in this case, a line graph. It did for one of my graphs, but not the other, and I've tried everything I could think of to solve this issue on my own.

I have three graphs created at the moment. The first one has points ranging from 0 to 25, and the y-axis shows a minimum value label of 0 and maximum value label of 30. So far so good.

The second graph only has points ranging from 25 to 29, and its y-axis shows a minimum value label of 24 and maximum value label of 30. Picture below. This is exactly what I want for the third graph as well.

The third graph has points ranging from 30 to 40, and if going by the logic of the second chart, its x-axis should show a minimum value label of, say, 28 and a maximum of, say, 42. Instead, it ranges from 0-50, as shown below.

Any ideas?