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3 years ago

8

PLEASEEEEE HELP ME

2 answers:

Nadya [2.5K]3 years ago

4 0

c. 44.25 trust me I just took the test.

Drupady [299]3 years ago

4 0

Answer:

The correct option is C.

Step-by-step 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.

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