Math, asked by asfgjkl, 1 month ago

In the xy -plane, 8 data points lie on the line with equation y = 40 + 5x. If the standard deviation of the coordinates of the 8 points is 4.6, what is the standard deviation of the y -coordinates of the 8 points?​

Answers

Answered by gprasanta049
3

Answer:

Substituting (r,s) in the original equation:

y=3x+2 => s=3r+2 => 3r-s+2=0.

Question : is 3r-s-2=0. ??

statement 1 - (3r+2-s)(4r+9-s)=0 => (3r+2-s)=0 or (4r+9-s)=0

Not sufficient

Statement 2 - (4r-6-s)(3r+2-s)=0 => (3r+2-s)=0 or (4r-6-s)=0

Not sufficient

Combining 1&2 ->

common result (3r+2-s)=0

Sufficient.

Answer - C

Answered by annysaha06201991
0

Answer:

Step-by-step explanation:

23

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