3 years ago

PART A

Mathematics

1 answer:

Harrizon [31]3 years ago

7 0

Answer: y=2.3x+160.7

Step-by-step explanation: correct on plato :)

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Which pair of functions are inverses of each other?

mart [117]

Answer:

Step-by-step explanation:

You can let y for the inverse

X =5y - 11

Then you will get

X+11=5y

Then x+11/5=y

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3 years ago

Compute the correlation coefficient for the data set. (2,19), (3,22), (4,26), (5,20), (6,35), (7,30), (9,40), (10,42), (11,35)

lakkis [162]

Answer:

The correlation coefficient of the data is 0.8679.

Step-by-step explanation:

The formula to compute the correlation coefficient is:

$r(X,Y)=\frac{n\cdot \sum XY-\sum X\cdot \sum Y}{\sqrt{n\cdot\sum X^{2}-(\sum X)^{2}}\times \sqrt{n\cdot\sum Y^{2}-(\sum Y)^{2}}}$

From the data provided compute the values of ∑ XY, ∑ X, ∑ Y, ∑ X² and ∑ Y².

The values are computed in the table below.

Compute the correlation coefficient as follows:

$r(X,Y)=\frac{n\cdot \sum XY-\sum X\cdot \sum Y}{\sqrt{n\cdot\sum X^{2}-(\sum X)^{2}}\times \sqrt{n\cdot\sum Y^{2}-(\sum Y)^{2}}}$

$=\frac{(9\times 1893)-(57\times 269)}{\sqrt{(9\times 441)-(57)^{2}}\times \sqrt{(9\times 8635)-(269)^{2}}}\\\\=\frac{1704}{\sqrt{720\times 5354}}\\\\=0.86788895\\\\\approx 0.8679$

Thus, the correlation coefficient of the data is 0.8679.

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3 years ago

PLEASE ANSWER THIS FAST!!!! ITS A BIG PART OF THE GRADE!!!!

Soloha48 [4]

Answer:

-2 > x > 5

Step-by-step explanation:

x < -2 and x > 5

-2 > x > 5 is the is the answer

Hope this helps and pls mark me brainliest if you can:)

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