A team of climatologists, civil engineers, and automobile engineers are gathering for a conference on climate science where their team is to deliver a keynote address on whether there is a link between fuel efficiency and carbon emissions. Fuel efficiency is measured in miles per gallon, or mpg, and carbon emissions are measured by grams of carbon released into the atmosphere per mile traveled, or g/mi. The data they gathered for 20 different vehicles can be found below. Use Excel to calculate the correlation coefficient r between the two data sets. Round your answer to two decimal places.

"mpg" CO2 emissions (g/mi) 29.4 370 24 396 23.8 401 22.5 367 22 457 21.7 417 22.2 436 20.4 456 21.2 390 20.7 424 20.1 409 20.4 371 21.1 428 20.5 421 19.3 411 19.2 407 20.1 377 20.3 466 19.8 419 18.7 448