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 (x) and their average heights in centimeters (y). What is the average height of a 5-year-old boy?

98.9 cm

78.7 cm

67.4 cm

62.4

Question

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 (x) and their average heights in centimeters (y). What is the average height of a 5-year-old boy?
		
98.9 cm
		
78.7 cm
		
67.4 cm
		
62.4

vocaloid · Answer

hint: x = 5
y = 6.3x + 67.4 = ?

misty1212 · Answer

use a calculator http://www.wolframalpha.com/input/?i=6.3*5+%2B+67.4

emmynimmy · Answer

a?

emmynimmy · Answer

Thanks!