Question

PLEASEEEEE HELP ME

About how tall would you expect one of these trees to be after 22 years ?

A. 22.31 ft
B. 35.2 ft
C. 44.25 ft
D. 46.2 ft

Answer 1

c. 44.25 trust me I just took the test.

Answer 2

The correct option is C.

Explanation:

The general form of linear regression equation is

`y=a+bx` .... (1)

where,

`b=\frac{\sum_(i=1)^nx_iy_i-n\overline{x}\overline{y}}{\sum_(i=1)^nx_i^2-n\overline{x}^2}`

`a=\overline{y}-b\overline{x}`

Using the graphing calculator, we get

`a=0.0142857`

`b=2.01071`

Substitute the values of a and b in equation (1).

`y=0.0142857+2.01071x`

The equation of line of best fit is y=0.0142857+2.01071x, where x is number of years and y is height of trees.

Substitute x=22 to find the height of trees after 22 years.

`y=0.0142857+2.01071(22)`

`y=44.2499057`

`y=44.25`

The height of trees after 22 years is 44.25 ft. Therefore the correct option is C.