Four-legged animals run with two different types of motion: trotting and galloping. An animal that is trotting has at least one foot on the ground at all times, whereas an animal that is galloping has all four feet off the ground at some point in its stride. The number of strides per minute at which an animal breaks from a trot to a gallop depends on the weight of the animal. Use the table to find a logarithmic equation that relates an animal's weight x (in pounds) and its lowest stride frequency while galloping y (in strides per minute).

Weight, x Stride Frequency, y DATA 25 191.5 35 182.7 173.8 50 75 164.2 500 125.9 1000 114.2 Spreadsheet at Larson Precalculus.com