QUESTIONS 11-13 REFER TO THE FOLLOWING TABLE. XOPERCENT CHANGE IN DOLL...

13. If the dollar amount of sales in store P was $800,000 in 1977,of these occur in sets of two to five questions that share com-what was the dollar amount of sales in that store in 1979?mon data in the form of tables, graphs, etc. In questions that(A) $727,200 (B) $792,000 (C) $800,000involve data analysis, graphs are drawn as accurately as pos-(D) $880,000 (E) $968,000sible. Therefore, you can read or estimate data values from thegraphs (whether or not there is a note that the graphs are drawnIf sales in store P were $800,000 in 1977, then in 1978 they wereto scale).110 percent of that, i.e., $880,000. In 1979 sales were 90 percent ofThe following strategies may help in answering problem$880,000, i.e., $792,000. Note that an increase of 10 percent in onesolving questions that involve data analysis.year and a decrease of 10 percent in the following year does not Scan the data briefly to see what it is about, but do notresult in the same dollar amount as the original dollar amount ofattempt to analyze it in too much detail before reading thesales because the base used in computing the percents changes fromquestions. Focus on those aspects of the data that are neces-$800,000 to $880,000. The best answer is (B).sary to answer the questions. Be sure to read all notes relatedto the data. When possible, try to make visual comparisons of the datagiven in a graph and estimate products and quotients ratherthan perform involved computations. Remember that these questions are to be answered only on thebasis of the data given, everyday facts (such as the number ofdays in a year), and your knowledge of mathematics. Do notmake use of specific information you recall that may seem torelate to the particular situation on which the questions are basedunless that information can be derived from the data provided.