I want know to which is the correct way to approach problems where we have to identify CC and CV mode.

The question is 

> For various load resistors, connected across $Channel-1$ of the DC power supply the following table is 
> obtained- 


| **$R_L$** | Output Voltage (V) | Load current (A) | Mode of Operation|
|--------|--------------------|-------------------|-----------------|
| $\infty$ | 5.00 | 0.00 | a|
| 100 | 5.00 | 0.05 | b|
| 200 | 5.00 | 0.25 | c|
 
Now we have to determine what modes are a, b, and c


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Now a simple approach goes to, since V is constant and load current is changing with values of load resistance so, a,b, and c must be a constant voltage mode.

But I have another approach as well according to the definition given in this text-

[![enter image description here][1]][1]

I will plot the values of V and I and see which line it is following, but for the third reading, we find that $R_L$ is greater than $R_c$, it will lie on CV mode line. Checking for all I get all a, b, and c in CV mode.

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Can I think like both? Am I missing something in approach second?




  [1]: https://i.sstatic.net/L8Fhh.png