A doctor collected data ro determine the association between agr of an infant and its weight. she modeled the equation y = 1.25x + 7 for the line of best fit. the independent variable, x, v. is time in months and the dependent variable, y, is weight in pounds. what does the slope mean in thjs context? A) an infant's starting weight is 7 pounds.

B) an infant's weight is 1.25 pounds.

C) an infant's weight increases by an additional 7 pounds for each month.

D) an infant's weight increases by an additional 1.25 pounds for each month.​