In Geoforum (Vol. 37, 2006), Simon Fraser University professor Nicholas Blomley assessed whether the price of a geography journal is correlated with quality. He collected pricing data (cost for a 1-year subscription in U.S. dollars) for a sample of 28 geography journals. In addition to cost, three other variables were measured: journal Impact Factor (IIF), defined as the average number of times articles from the journal have been cited; number of citations for a journal over the past 5 years; and Relative Price Index (RPI), a measure developed by economists. [A journal with an RPI less than 1.25 is considered a "good value."] The data for the 28 geography journals are listed in the accompanying table.
a. Construct a scatter plot for the variables JIF and cost. Do you detect a trend?
b. Construct a scatter plot for the variables number of cites and cost. Do you detect a trend?
c. Construct a scatter plot for the variables RPI and cost. Do you detect a trend?

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Journal Cost () JIF Cites RPI l Econ. Geogr Prog Hum. Geog. T.I. Brit. Geogr. Econ. Geogr. A. A. A. Geogr. Antipode Reg Stud. Environ. Plan A Environ. Plan D Geoforunm 468 3.139207 1.16 624 2.943 544 0.77 499 2.388 249 1.11 90 2.325 173 0.30 698 2.115 377 0.93 1.922 333 0.96 1312 652 445 1.49 1,297.622 773 0.91 1591 2970.99 1118 560 298 1.58 242 1.475 215 0.53 1,099 1316 282 1.92 1.733 1234 240 3.42 1.56 479 Polit. Geog Int. J. Geogr. IS Landscape. Ur. Plan Sing. J. Trop. Geo. Aust. Geogr. Eur. Geogr. Eco. Urban. Geogr. . Hist. Geogr. Tij. Eco. Soc. Geo Cult. Geo Pap. Reg. Can. Geo. Can. J Geo. High. Ed. Cartogr Geogr. Anal. Geogr. J 1,619 1204 446 345 0.94772 1.83 62 1.99 530 0.667 135 1.81 96 144 99 1.00 538 0.500 24NA 89 1.36 74 105 499 0.780 388 343 0.661 0.518 397 0.481 0.429 1,115 0.413 266 0.295 18 3.11 213 0.902 106 0.88 81 0.94 0.853 74 3.38 223 0.857 646