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2 years ago

Write a linear equation that passes throughthe point (2, -9) and has a slope of -5 in slope-intercept form. Help pls

1 answer:

6 0

Plug the x and y in the slop intercept form (y=mx+b) so it becomes -9= -5(2)+b solve for b. b=1 so the answer is y= -5x+1

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Find the equation of a circle with center at (5, 6) and radius 8.

Elanso [62]

Answer:

(x - 5)^2 + (y - 6)^2 = 64

Step-by-step explanation:

Every circumference is in the form:

(x - xc)^2 + (y - yc)^2 = r^2

Where xc is the x of the center. Yc is the y of the center. r is the radius. We just plug in the values and we're done.

5 0

1 year ago

Read 2 more answers

If the coefficient of determination is 0.25 and the sum of squares residual is 180, then what is the value of SSY?

Gennadij [26K]

Answer:

And then $SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240$

C. 240

Step-by-step explanation:

Previous concepts

Analysis of variance (ANOVA) "is used to analyze the differences among group means in a sample".

The sum of squares "is the sum of the square of variation, where variation is defined as the spread between each individual value and the grand mean"

When we conduct a multiple regression we want to know about the relationship between several independent or predictor variables and a dependent or criterion variable.

If we assume that we have $k$ independent variables and we have $j=1,\dots,j$ individuals, we can define the following formulas of variation:

$SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2$

$SS_{regression}=SS_{model}=\sum_{j=1}^n (\hat y_{j}-\bar y)^2$

$SS_{error}=\sum_{j=1}^n (y_{j}-\hat y_j)^2 =180$

And we have this property

$SST==SSY=SS_{regression}+SS_{error}=SSR+180$

If we solve for SSR we got:

$SSR= SSY-180$ (1)

And we know that the determination coefficient is given by:

$R^2 = \frac{SSR}{SSY}$

We know the value os $R^2= 0.25$ and we can replace SSR in terms of SSY with the equation (1)

$R^2 =0.25= \frac{SSY-180}{SSY}= 1-\frac{180}{SSY}$

And solving SSY we got:

$\frac{180}{SSY}=1-0.25=0.75$

$SSY= \frac{180}{0.75}=240$

And then $SSY=SS_{total}=\sum_{j=1}^n (y_j-\bar y)^2 =240$

C. 240

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3 years ago

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Lina20 [59]

Answer:

Step-by-step explanation:

There 6 digits in this number so its of magnitude 6.

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3 years ago

What is the answer plz help

seropon [69]

Answer:

y = 5x + 4

Step-by-step explanation:

The slope always goes before the x and your y-intercept is plus or minus depending on weather it is positive or negative. Your parent function or standard equations) is y = mx + b, so just plug your variable into there.

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3 years ago

List factors of 24 36 27 and 7

Helen [10]

Answer:

The factors of 7 are 1, and 7.

The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24.

The factors of 27 are 1, 3, 9, and 27.

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Step-by-step explanation: I hope this helps :).

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2 years ago