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scoundrel [369]
3 years ago
14

A set of data has a correlation coefficient r = 0.15. Is it reasonable to use the line of best fit to make predictions from the

data?
Mathematics
2 answers:
Sholpan [36]3 years ago
8 0
Answer:
It is not reasonable to use the line of best fit to make predictions from the data.

Explanation:

A correlation coefficient of r = 0.15 means that the goodness of fit for the data from linear regression analysis is
r² = 0.15² = 0.0225.

When r²=1, it means that correlation between the dependent and independent variable is perfect, and the dependent variable can be predicted reliably.

When r²=0, it means that there is absolutely no correlation between the dependent and independent variable.

When r²>0.9, it means that reasonable correlation exists between the dependent and independent variable.

A value of r²=0.0225 is extremely low, therefore it is not reasonable to use the line of best fit to make predictions.
Mumz [18]3 years ago
3 0

Answer:

no

Step-by-step explanation:

  • It is not reasonable to use the line of best fit to make predictions.
  • The correlation coefficient for the data is close to zero.
  • The correlation coefficient measures how well a line fits a set of data.
  • The correlation coefficient suggests that the relationship between the two variables is weak.

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Answer:

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Step-by-step explanation:

f(x) = e^{2x^2}

lets calculate the derivate of f using the chain rule:

f'(x) = e^{2x^2}* (2x^2)' = e^{2x^2}*4x = 4e^{2x^2}x

we have that f'(1) = 4e^2, hence the equation is

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or, equivalently,

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3 years ago
Math question! Please help!!
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3 years ago
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andriy [413]
Answer: stretched by a factor of 2 and translated 8 units right and 5 units down

Explanation:

These is the set of choices that accompany with this question:


<span>a) stretched by a factor of 2 and translated 64 units right and 5 units down
b) stretched by a factor of 8 and translated 8 units right and 5 units down
c) stretched by a factor of 2 and translated 8 units right and 5 units down
d) stretched by a factor of 8 and translated 64 units right and 5 units down


Solution:

</span>Let's work a little the given function to compare it with the parent function.

1) The given function is y = ∛[8x - 64] - 5

2) Extract common factor 8 of the expression inside the square brackets:

y = ∛[ 8( x - 8) ] - 5

3) Extract 8 from the root:

y = 2∛(x - 8) - 5

4) The parent function is ∛x. Call the parent function g(x) => g(x) = ∛x

5) Compare: y is 2 * g(x - 8) - 5

6) Analyze the meaning of that:

g(x - 8) means that the graph of the function is translated 8 units to the right

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So, the description of the graph y = ∛(8x - 64) - 5 compared to the parent cube root function is: stretched by a factor of 2 and translated 8 units right and 5 units down


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4 years ago
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Answer:

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Step-by-step explanation:

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<u><em>Given that x = -2</em></u>

<em>Putting in the above equation</em>

9(-2) -4y = 20

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<em>Dividing both sides by -4</em>

y = -\frac{38}{4}

y = -\frac{19}{2}

y = -9 \frac{1}{2}

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