After birth, a baby's weight increased at a steady rate for several weeks.
A linear model of this situation contains the values (1, 7.3) and (9, 9.7), where x represents the number of weeks, and y represents the baby's weight, in pounds.
Q.What was the baby's weight at birth?
A.0.3 of a pound
B.8 pounds
C.7.3 pounds
D.7 pounds