Considering as example the decomposition of nitrogen dioxide into nitrogen monoxide and molecular oxygen: 
Based on the red "line of best fit" plotted in the graph given above:
Points read from graph:
Slope of red line = (4.1 − 2.2) / (0.0015 − 0.00165) = −12,667
Intercept [y-value at x = 0] of red line = 4.1 + (0.0015 × 12667) = 23.1
Inserting these values into the form above:
yields:
as shown in the plot at the right.
for:
* k in 10 cm mol s
* T in K
Substituting for the quotient in the exponent of :
where the approximate value for R is 8.31446 J K  mol
The activation energy of this reaction from these data is then: