For children between the ages of 18 months and 29 months, there is approximately a linear relationship betweenheightandage. The relationship can be represented by = 60.55 + 0.62xwhereyrepresents height (in centimeters) andxrepresents age (in months). Joseph is 23.5 months old and is 81 centimeters tall. What is Joseph's residual?

a)-29.770 b)8.880 c)5.880 d)110.770 e)75.120 f)None of the above