For a reaction X Y , the graph of the product concentration (x) versus time (t) came out to be a straight line passing through the origin. Hence the graph of -d[X] d t and time would be

Step-by-step solution

If product concentration is x . For a zero order reaction x t =k Thus graph would be a straight line passing through origin. So the given information is for zero order reaction. For a zero order reaction, rate of the reaction is constant. Thus, plot of rate v s time, i.e., - d[X] d t v s time will be a straight line parallel to x -axis.