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KatRina [158]
3 years ago
5

If the rvalue, or correlation coefficient, of a data set is negative, the

Mathematics
1 answer:
lutik1710 [3]3 years ago
3 0

Answer:

Step-by-step explanation:

The correlation coefficient being negative means that the tendency of the dots in the plane is a negative slope; the coefficientof determination tells you how close the dots are to being on the linear regression equation. This vaue falls between 0 and +1. This value will never be negative; the answer is false.

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Suppose c is inversely proportional to the square of d. If c=6 when d=3⁢, find the constant of proportionality and write the for
NemiM [27]

Answer:

The constant of proportionality is 54.

k = 54

c as a function of d:

c(d) = \dfrac{54}{d^2}

c(7) = \dfrac{54}{49}

Step-by-step explanation:

We are given the following in the question:

c is inversely proportional to the square of d.

\Rightarrow c\propto \dfrac{1}{d^2}\\\\\Rightarrow c = \dfrac{k}{d^2}\\\\\text{where k is constant of proportionality}

When c = 6, d = 3.

Plugging the values, we get,

6 = \dfrac{k}{3^2}\\\\\Rightarrow k = 6\times 3^2 = 54

Thus, the constant of proportionality is 54.

c as a function of d can be written as:

c(d) = \dfrac{54}{d^2}

We have to find value of c when d = 7.

Putting values, we get,

c(7) = \dfrac{54}{(7)^2}=\dfrac{54}{49}

is the required value of c.

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