EXAMPLES XXIII 425 



(17) From the given table of values of x and y, find the best 



values of -=^ and -j-^ when x = 4-5 

 ax ax* 



x 8-0 3-5 4-0 4-5 5-0 5-5 6-0 



y 4-780 4-405 6-780 12-655 22-780 37-905 58-780 



(18) Working with the tabular values of and p given in 

 paragraph 200, find the best values of -~ and - when = 100. 



(19) Working with the tabular values of 6 and p given in 



f ! I ) ($^"0 



paragraph 200, find the best values of - and - when = 125. 



