Powers and working with data

A table presents data in an orderly, visual way. In a survey we mark a tally stroke for each answer and then write the number of strokes in the table. If we show data as columns whose heights equal the values, we get a bar chart. Names go on the horizontal axis; amounts go on the vertical axis with a chosen unit of scale. The columns have the same width and equal gaps. Using segments instead of columns gives a line chart; in a strip diagram the strips lie horizontally. From a diagram we can find the greatest and smallest values, differences and how many times larger one value is.