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2 years ago

F(x) = -x² - 9x - 4 Find f(10)

Mathematics

1 answer:

Natasha_Volkova [10]2 years ago

5 0

-194
F(10)= -(10)^2-9(10)-4=-194

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The Correlation Coefficient for a relationship is - 0.95. What percentage of the dependent variable in the correlation is due pu

seropon [69]

Answer:

The unexplained variance would be 100-90.25 % = 9.75. And that correspond to the percentage of the dependent variable in the correlation is due purely to chance

Step-by-step explanation:

Previous concepts

Pearson correlation coefficient(r), "measures a linear dependence between two variables (x and y). Its a parametric correlation test because it depends to the distribution of the data. And other assumption is that the variables x and y needs to follow a normal distribution".

In order to calculate the correlation coefficient we can use this formula:

$r=\frac{n(\sum xy)-(\sum x)(\sum y)}{\sqrt{[n\sum x^2 -(\sum x)^2][n\sum y^2 -(\sum y)^2]}}$

On this case we got that r =-0.95

In order to find the % of variance explained by the model we need to calculate the determination coefficient given by:

$R^2 = (-0.95)^2 = 0.9025$

And that means this : "90.25% of the variation of y is explained by the variation in x"

So then the unexplained variance would be 100-90.25 % = 9.75. And that correspond to the percentage of the dependent variable in the correlation is due purely to chance

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4 years ago

Which mathematical property is demonstrated? 5⋅7⋅4=5⋅4⋅7

gavmur [86]

Commutative Property is used here

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4 years ago

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which equations represent in point slope form, the line that passes through the points (-3,2) and (0,0) ?

alexandr1967 [171]

Answer: First Option is correct.

Explanation:

Since we have given that

there are two points from which the line is passing through :

$(-3,2)\ and\ (0,0)$

We have to use the two point slope form .

As we know the " Two point slope form" i.e.

$y-y_0=\frac{y_2-y_1}{x_2-x_1}(x-x_1)$

Here,

$x_1=-3\\\\x_2=0\\\\y_1=2\\\\y_2=0$

So, our equation becomes,

$(y-2)=\frac{0-2}{0+3}(x+3)\\\\(y-2)=\frac{-2}{3}(x+3)$

Hence, First Option is correct.

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4 years ago

What is an Arithmetic progression?what is an arithmetic progression?

alexandr402 [8]

Answer:

Arithmetic Progression is another way to say Arithmetic sequence. It is basically a sequence of numbers that the difference between the consecutive terms are constant.

Heres and example:

1, 3, 5, 7, 9, 12, 15, 18.....etc.

This has an arithmetic progression of 2.

Hope this helped! Reach out to me if you have any more questions about this!

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3 years ago

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At bonnie's bagels, you can choose from five different types of bagels, four different spreads, and four different toppings. how

Arisa [49]

Times all the numbers together. 5 bagels x 4 spreads x 4 toppings= 80

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3 years ago

F(x) = -x² - 9x - 4 Find f(10) ​

F(x) = -x² - 9x - 4 Find f(10)