Respuesta :
The table and the graph both illustrate a linear function
- Baby Grace's rate of change is 0.75 inches per month
- Her equation is: [tex]y - 20= 0.75(x - 4)[/tex].
- Her length at birth was 17 inches, while her length in 36 months will be 44 inches
- Baby Clair's slope is 2 inches per month
- Baby Clair has a faster growing rate
- Her equation is [tex]y - 22 = 2(x - 4)[/tex].
- Her length at birth was 14 inches
Baby Grace
(a) The rate of change
Select any two points from the given table
[tex](x_1,y_1)=(4,20)[/tex]
[tex](x_2,y_2)=(8,23)[/tex]
The rate of change (m) is:
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]m = \frac{23 - 20}{8 - 4}[/tex]
[tex]m = \frac{3}{4}[/tex]
[tex]m=0.75[/tex]
The rate of change is 0.75 inches per month
(b) The linear equation
The equation in point slope form is:
[tex]y - y_1 = m(x - x_1)[/tex]
So, we have:
[tex]y - 20= 0.75(x - 4)[/tex]
(c) Her length at birth
At birth, the number of months is 0
i.e. x = 0
So, we have:
[tex]y - 20= 0.75(0 - 4)[/tex]
[tex]y - 20= 0.75(- 4)[/tex]
[tex]y - 20= -3[/tex]
Solve for y
[tex]y = 20 - 3[/tex]
[tex]y = 17[/tex]
Her length at birth was 17 inches
(d) Her length in 36 months time
This means that: x = 36
So, we have:
[tex]y - 20= 0.75(36 - 4)[/tex]
[tex]y - 20= 0.75(32)[/tex]
[tex]y - 20= 24[/tex]
Solve for y
[tex]y = 20+ 24[/tex]
[tex]y = 44[/tex]
Her length in 36 months will be 44 inches
Baby Claire
(a) The slope
Select any two points from the given graph
[tex](x_1,y_1)=(4,22)[/tex]
[tex](x_2,y_2)=(14,30)[/tex]
The rate of change (m) is:
[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]
[tex]m = \frac{30 - 22}{14 - 4}[/tex]
[tex]m = \frac{8}{4}[/tex]
[tex]m = 2[/tex]
The slope is 2 inches per month
(b) Compare their growing rates
Baby Grace growing rate is 0.75 inches per month
Baby Clair growing rate is 2 inches per month
By comparison,
Baby Clair has a faster growing rate
(c) The linear equation
The equation in point slope form is:
[tex]y - y_1 = m(x - x_1)[/tex]
So, we have:
[tex]y - 22 = 2(x - 4)[/tex]
(d) Her length at birth
This means that: x = 0
So, we have:
[tex]y - 22 = 2(x - 4)[/tex]
[tex]y - 22 = 2(0 - 4)[/tex]
[tex]y - 22 = 2(- 4)[/tex]
[tex]y - 22 = - 8[/tex]
Solve for y
[tex]y = 22- 8[/tex]
[tex]y =14[/tex]
Her length at birth was 14 inches
Read more about linear equations at:
https://brainly.com/question/11897796