Find the equation of the least-squares line for the given data.Draw a scatter diagram for the given data and graph the least-squares line. 
Definitions:
Preschooler
A child typically between the ages of 3 and 5 years, who is not yet of school age.
Preschool Years
The period in a child's life prior to attending kindergarten, roughly between the ages of 3 and 5, when they may attend preschool to begin early education.
Elementary School
A school for the early years of a child's education, typically encompassing grades kindergarten through 5 or 6 in the United States.
Puberty
The developmental stage in which an individual becomes capable of sexual reproduction, marked by physical changes and hormonal shifts.
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