Use a calculator to find the r-value of these data. round the value to three decimal places.

The answer is r = -0.9853 or -0.985

 It's calculated as
   r = -108.2 / √((132.8)(90.8)) = -0.9853

Set your calculator to REG then LIN. Input the data as 5,19 then press M+. Continue doing this until the last data. To find r, press SHIFT then number 2 and look for r value. You can only follow this procedure if we have the same calculator. You can use an online calculator also in finding r. in socscistatistics (dot) com. Refer to the attached picture for the graph, values, and computation.

Heptagon is the correct ans

How am i goonna know explain