Data Interpretation Line Graphs Tests

Let expenditures of Company B in 2003 and 2004 are Rs. 5x and Rs. 7x respectively; then
their income in 2003, ${\mathit{I}}_1$ = $5\mathit{x}+\frac{40}{100}\times 5\mathit{x}$ = Rs. 7x
Also their income in 2004, ${\mathit{I}}_2$ = $7\mathit{x}+\frac{30}{100}\times 7\mathit{x}$ = Rs. $\frac{91}{10}\mathit{x}$
Hence, the required ratio $=7\mathit{x}:\frac{91}{10}\mathit{x}=10:13$