Answer: There is no change in the number of state representatives for fourth state after the last census.
Explanation:
Here, the Data set {+4,-1,-2,0} shows a change in number of state representatives for four states after the last census.
In the first state the changes is +4, that is, there is an increase of the number of representative in first state by factor four.
In the second state the changes is -1, that is, there is an decrease of the number of representative in second state by factor one.
In the third state the changes is -2, that is, there is an decrease of the number of representative in second state by factor two.
In the fourth state changes is 0, therefore, there is no change in the number of representative in fourth state.