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blondinia [14]
3 years ago
13

The scatter plot presents Ray’s monthly electricity bills and the amount of time Tay spent at home from January through August.

The correlation coefficient (r) is _______. The correlation coefficient can be improved by ignoring the bill for the month of __________.
Mathematics
2 answers:
k0ka [10]3 years ago
6 0

Answer:

0.9168

4th data point.

Step-by-step explanation:

Using the estimated data point culled from the attached graph, the correlation Coefficient for the plotted regression data should be approximately 0.9168 which depicts that a strong positive correlation exists between the Electricity bill ($) and the time spent at home because the Coefficient obtained is very close to 1. And the measure if the strength of a relationship using the correlation Coefficient is how close the R value is to either ±1.

The electricity bill that should be ignored to improve the correlation Coefficient is the 4tg data point on the graph as it is farthest away from the regression line when compared to other points.

kompoz [17]3 years ago
3 0

Answer:

The correlation coefficient (r) is .91.  the correlation coefficient can be improved by ignoring the bill for the month of July

Step-by-step explanation:

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Answer:

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3 years ago
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Kobotan [32]
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3 years ago
What is the domain of f(x)=-5x+4
ANTONII [103]

Answer:

f(x) = -5x + 4

Domain refers to the values of x that would result to  a defined value of y. Since the given f(x) is a linear function, then all the values of x would give a corresponding value of y. So, the domain of f(x)=-5x+4 are all real numbers.

Or, plot the given equation to check.

The graph of f(x)=-5x+4 is shown below.

Since the graph is a straight line and can be extended continuously on both ends,  this indicates that every values of x, there is a corresponding value of y.

Hence, the domain of the given function are all real numbers.Step-by-step explanation:

4 0
3 years ago
Use the compound interest formula to determine the final value of the following amount. $1900 at 10.4% compounded monthly for 4.
nikklg [1K]

Answer:

$3027.80

Explanation:

The compound interest formula is the following.

A=P(1+\frac{r}{n})^{nt}

where

A = final amount

P = principle amount

r = interest rate / 100

n = number of compounds per interval

t = time interval

Now in our case,

A = unknown

P = $1900

r = 10.4/100

n = 12 months / year ( because the interest is compounded monthly)

t = 4.5 yrs

Therefore, the compound interest formula gives

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Using a calculator, we evaluate the above to get

\boxed{A=\$3027.80}

which is our answer!

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1 year ago
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Answer:

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Step-by-step explanation:

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