A veterinarian collected data on the average weight of dogs by age in months. Interpret the slope and the y-intercept (0,0) of the linear model, using ordered pair (9,42). Round the slope to the nearest hundredth. A) every month, a dog averages a gain of 0.21 pounds and weighs 0 pounds at birth. B) Every month, a dog averages a gain of 4.67 pounds. C) Every month, a dog average a gain of 4.3 pounds and weighs 0 pounds at birth. D) Every 4.67 months, a dog averages a gain of 1 pound and weighs 0 pounds at birth.
A) every month, a dog averages a gain of 0.21 pounds and weighs 0 pounds at birth.
Interpretation: The slope of the linear model is 0.21, which means that on average, a dog gains 0.21 pounds for each additional month of age. The y-intercept of the model is (0,0), which means that a dog weighs 0 pounds at birth.
Therefore, the correct interpretation is A) every month, a dog averages a gain of 0.21 pounds and weighs 0 pounds at birth.