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Use matrices to represent data


This matrix represents the number of direct train routes between three different cities, where rows are starting points and columns are end points.
start subscript, start text, S, t, a, r, t, end text, end subscript, \diagdown, start superscript, start text, E, n, d, end text, end superscriptCity 1City 2City 3
City 1031
City 2302
City 3start box, 2, end box12
Complete the interpretation for the boxed cell in the 3, start superscript, start text, r, d, end text, end superscript row, 1, start superscript, start text, s, t, end text, end superscript column of the matrix.
There are
different direct train routes going from