=+5.46 ● The paper “Feeding of Predaceous Fishes on Out-Migrating Juvenile Salmonids in John Day Reservoir, Columbia River” (Transactions of the American Fisheries Society [1991]: 405–420) gave the following data on y 5 maximum size of salmonids consumed by a northern squawfish (the most abundant salmonid predator) and x 5 squawfish length, both in millimeters:

x 218 246 270 287 318 344 y 82 85 94 127 141 157 x 375 386 414 450 468 y 165 216 219 238 249