Revenue Growth of Three Tech Companies

The x-axis represents 'initial six years of operations' rather than absolute calendar years (like 2010). Since we do not know which operational year corresponds to 2010 for each company, data is insufficient.

Average annual growth rate $r$ over 2 years: $(1+r)^2 = \frac{R_6}{R_4}$. For Yahoo: $\sqrt{1200/250} - 1 = \sqrt{4.8} - 1 \approx 2.19 - 1 = 119\%$. For Facebook: $\sqrt{2000/300} - 1 = \sqrt{6.67} - 1 \approx 2.58 - 1 = 158.2\%$. Difference $\approx 159\% - 119\% = 40\%$.

Google's growth rate from year 5 to 6 = $\frac{3200 - 1500}{1500} = \frac{1700}{1500} = 113.33\%$. Facebook's year 5 revenue = 750. If Facebook grew by $113.33\%$, its year 6 revenue = $750 \times (1 + 1.1333) = 1600$ million.