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3 years ago

I need help ASAP! Anyone help?

Mathematics

2 answers:

inysia [295]3 years ago

7 0

The second one. (B) because i learned about it in 6th grade.

qaws [65]3 years ago

3 0

Yes he is correct, I did too

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Pls help me idk what this is

Margaret [11]

Answer:

B. -6 ≤ y ≤ 9

General Formulas and Concepts:

<u>Algebra I</u>

Range is the set of y-values that are outputted by function f(x)

Step-by-step explanation:

According to the line in the graph, our y-values span from -6 to 9. Since both are closed dot, they are inclusive in the range:

Range: [-6, 9] or -6 ≤ y ≤ 9

6 0

3 years ago

Read 2 more answers

What is the property that justifies the illustrated step in solving the equation?

andrew11 [14]

Commutative property of addition is being used.

This means that you can switch around where the numbers are and still get the same answer.

Hope this helps!

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3 years ago

The number of hours students spent using

djyliett [7]

XY. Electronics can be X and sports Y. Then simply multiply

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3 years ago

For a particular cargo train, the amount of fuel needed for a trip varies directly with the number of miles it plans on travelin

Katyanochek1 [597]

2250 gallons. You have to think of the ratio. 300•750=225000
225000/100=2250
You have to do cross multiplication

4 0

3 years ago

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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

8 0

4 years ago