Riemann sums and sigma notation

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Understanding how Riemann sums can result in "negative area"
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I'm confused, for 1, I plugged in my values and I got an area of -2.25 for i = 1 (but the area can not be negative so 2.25), then for i = 2 the area is -2 (but the area cannot be negative so 2) point is the graph is not representative of the results? Please correct me if I'm wrong I'm confused.

nonsensespeaks
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I knew it. The moment he said "right hand rectangle" I knew he was going to tangent off and waste time explaining that. But when it comes to understanding important things he never gets to it, just the basics.

GBryce
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Wouldn't the first one give a negative value too

majorux