High values of r^2 and residual sum of squares

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The table below shows the average time T it takes for a computer to sort n items

n (items) 5 10 50 100 500 1000

T (microseconds) 17.4 28.2 157.6 305.5 2812.9 9701.0

Use your graphics calculator to fit a quadratic model to the data.

The value of r^2 for the quad model is 0.9999519 (indicating a strong fit). However, the SS(res) is coming out to be 3552 (which is very high indicating not a good fit).

Could someone please help with this?

Thanks