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The effect of temperature on the rate of a reaction was studied and the following data obtained:
k (s^{1})  T (°C) 
1.91×10^{4}  5 
2.25×10^{4}  7 
3.07×10^{4}  11 
3.58×10^{4}  13 
4.84×10^{4}  17 
7.49×10^{4}  23 
1.06×10^{3}  28 
1.22×10^{3}  30 
It is known that the variation of the rate constant k with the absolute temperature T is described by the Arrhenius equation:

where E_{a} is the activation energy, R is the universal gas constant and A is the preexponential factor (units of the rate constant). Taking the natural logarithm of both sides affords:

For a plot of y = ln k versus x = 1/T, calculate the slope of the best straight line using linear regression.
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