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Mathematics 16 Online
Pixel:

http://prntscr.com/h5d1mv

Pixel:

@Ultrilliam @Vocaloid @563blackghost

Pixel:

3 is true

563blackghost:

I know for sure the first one is `FALSE` since the amount charge for 1 hr is the unit rate or can be represented by the slope. The second one is `TRUE` since the problem says `the only expense is for advertising`.

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