Why does Supply slope upwards? (The law of increasing opportunity cost and supply)

[@S24W2]

Sorry may I ask, here it looks like the cost of producing a unit is the same as the cost of producing the previous one as the slope of the curve is approx =1. But I thought the cost of producing the next unit is greater,? Am I missing something? Thank you

[@leibert6320]

Yes the curve should've been curved I think.

[@benjaminnichols4850]

Tenth comment?

[@sensitivemilk]

sixth comment?

[@wallyloveee]

Third comment?

[@KavishSaini]

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[@marine2262]

seventh comment?