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We generally take distance in y axis so the y co-ordinate will the distance like example co-ordinate for distance time graph is (2,3) then your distance covered is 3 mtrs or km as per you take the unit in the distance time graph.
1 5 1
We demarcate the distance on Y-axis...when we plot a point in distance-time graph;the ordinate...i.e,the y co-ordinate is the distance,4)
distance travelled =4 units.
hope i helped u:)