Question

One simple method to predict adult height is to average the parents’ heights in inches and then add 2.5 inches if the child is a boy or subtract 2.5 inches if the child is a girl. This method can be fairly accurate, but can also be as much as 5 inches above or below the child’s eventual height.Use the variable D, which means height of dad and M, which means height of mom1. Write the formula for a boy’s adult height.(5 points) 2. Write the formula for a girl’s adult height.(5 points)

Answer 1

We are given that a boy's height is predicted by adding 2.5 inches to the average of the height of the parents. If "D" is the height of the father and "M" is the height of the mother then the average is determined by adding the two heights together and dividing by 2, like this:

`(D+M)/(2)`

Since the height of the boy is determined by adding 2.5 inches to this average, this means that the height of the boy "B" is:

`B=(D+M)/(2)+2.5`

The height of a girl "G" is determined by subtracting 2.5 to the average, therefore we have:

`G=(D+M)/(2)-2.5`