The equation y = 6.3x + 67.4 is the equation of a linear model in a scatter plot comparing the ages of boys between 2 and 10 years old open (x) and their average heights in centimeters open (y).What is the average height of a 5-year-old boy?98.9 cm78.7 cm67.4 cm62.4 cm
Accepted Solution
A:
Since the age of the boy is represented using x, when the boy is 5 years old, x = 5. y = 6.3x + 67.4 = 6.3(5) + 67.4 = 98.9
Since the average height of an age group is represented using y, when y = 98.9, the average height of a 5-year-old boy is 98.9 cm.