What is the area of the region bounded by the lines x = 5, y = 4 and the coordinate axes?

The equation of the given lines are x = 5 and y = 4. 

Consider line x = 5. 

For any value of y, the value of x is 5. 

Hence, when line x = 5 is plotted, a line parallel to y-axis at a distance of 5 units to its right is obtained. 

Consider line y = 4. 

For any value of x, the value of y is 4. 

Hence, when line y = 4 is plotted, a line parallel to x-axis at a distance of 4 units above it is obtained. 

Thus, the graph of the equations cover the area 5$\times$4unit sq. = 20 unit sq.