Kaplan Graph - Titration Question

[SSerenity]

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It looks like the equivalence point begins at 4 and ends at 10. But the Kaplan authors seem pretty sure it begins at 5. Is there a subtle point about this graphs curvature that I am just missing?

 

[SSerenity]

NVM. I found 3 more graphs on their quizes that are just blatantly wrong. This is definitely just another one.

Excellent work Kaplan 😉