Anthropologists use a linear model for predicting the height (y) of an individual in centimetres using their femur length (x) in centimetres. The model allows an anthropologist to determine the height of an individual when only a partial skeleton (including the femur) is found. In this problem, by analyzing the data on femur length and height for eight males, the least-squares regression line obtained has the following equation: y = 80.6 + 1.9% What is the best interpretation for the slope of this regression line? On average, femur length goes up by 1.9 centimetres for each additional centimetre increase in the individual's height. On average, femur length goes down by 1.9 centimetres for each additional centimetre increase in the individual's height On average, the height of an individual goes up by 1.9 centimetres for each additional centimetre increase in femur length. On average, the height of an individual goes down by 1.9 centimetres for each additional centimetre increase in femur length