Question

PLEASE HELP!!

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 parentheses x close parentheses and their average heights in centimeters open parentheses y close parentheses.



What is the average height of a 5-year-old boy?
Question 24 options:


98.9 cm


78.7 cm


67.4 cm


62.4 cm

Answer 1

98.9 cm

Explanation:

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

took the test and this was correct

Answer 2

The average height of a 5-year-old boy is
`98.9\ cm`

Explanation:

Let

x------> the ages of boys between 2 and 10 years old

y-----> the average heights in centimeters

we have

`y=6.3x+67.4`

so

For
`x=5` year-old-boy

substitute in the equation the value of x to find the value of y

`y=6.3(5)+67.4=98.9\ cm`