Explain how you would determine the distance from austin to
washington, d. c., using this map.

The bar scale is the ruler-like graphic scale and on this picture, it is located in the bottom left corner. The way you measure with it is you take a ruler or a compass and measure the distance between the two points. Then you use the distances on the bar scale and the distance you measured to see the air distance between the two points.

brave new world, aldous huxley (1932)