[TI Course] Is there any problem with Figure 4.3.2 of 4.3.1 Differential Amplifier?

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[TI Course] Is there any problem with Figure 4.3.2 of 4.3.1 Differential Amplifier? [Copy link]

Basic knowledge of electronic circuits lecture 42 4.3.1 In the differential amplifier , is there a problem with Figure 4.3.2?

From the above formula 4.3.2, we can see that R1 and the output voltage are inversely proportional, while Figure 4.3.2 shows a direct proportional relationship. Please confirm whether the drawing is correct.

Jacktang

From the screenshot it seems there is an error

I don't know which part of the whole lecture is