MATHEMATICS HIGH SCHOOL

Which best describes the strength of a model with an r-value of 0.29?a weak positive correlation
a strong positive correlation
a weak negative correlation
a strong negative correlation

Answers

Answer 1
Answer:

The correct answer is:

a weak positive correlation

Explanation:

An r-value, or correlation coefficient, tells us how closely the regression fits the data. R-values range from -1 to 1; -1 indicates a perfect negative fit, while 1 indicates a perfect positive fit. The closer a negative r-value is to -1, the better the fit; the closer a positive r-value is to 1, the better the fit. The closer either of these are to 0, the weaker the fit.

Since 0.29 is positive, this is an increasing fit. Since it is closer to 0 than 1, it is a weak fit.
Answer 2
Answer:

A model with an r-value of 0.29 represents a weak positive correlation

How to interpret the correlation?

The correlation coefficient has its value to be from -1 to 1

The correlation coefficient is given as:

r = 0.29

The closer the value to 0, the weaker the correlation.

0.29 is closer to 0, than it is to 1

And 0.29 is positive

Hence, a model with an r-value of 0.29 represents a weak positive correlation

Read more about correlation at:

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. A recipe calls for 3 teaspoons of salt for every 5 cups of flour. If you wanted to make a larger batch with 15 cups of flour, how much salt would you need? A. 5 teaspoons B. 10 teaspoons C. 9 teaspoons D. 6 teaspoons

Answers

Given:
3 teaspoons of salt for every 5 cups of flour.

How much salt is needed for 15 cups of flour?

This is a proportion problem:
a/b = c/d where ad = bc

3/5 = x/15
3*15 = 5x
45 = 5x
45/5 = x
9 = x

C. 9 teaspoons of salt is needed for 15 cups of flour.

3/5 = 9/15
3*15 = 5*9
45 = 45

Stuck on this ixl, help me!

Answers

Answer:

-1

Step-by-step explanation:

in negative numbers, it goes the opposite of positive numbers
The correct answer is -1.

If 2KL=KL+MN, then KL=MNChoose the definition, theorem, or postulate that justifies the statement.

A. Subtraction Property of Equality
B. Definition of Midpoint
C. Segment Addition Postulate
D. Symmetric Property (of= or≅)
E. Reflexive Property (of= or≅)
F. Transitive Property (of= or≅)
G. Definition of Congruence
H. Substitution Property
I. Addition Property of Equality
J. Multiplication Property of Equality
K. Division Property of Equality

Answers

The definition, theorem, or postulate that justifies the statement "If 2KL=KL+MN, then KL=MN" is the Segment Addition Postulate.

How to find the Line segment postulate?

The segment addition postulate states that if we are given two points on a line segment, A and C, a third point B lies on the line segment AC if and only if the distances between the points meet the requirements of the equation:

AB + BC = AC

The definition, theorem, or postulate that justifies the statement "If 2KL=KL+MN, then KL=MN" is the Segment Addition Postulate.

The Segment Addition Postulate states that if three points A, B, and C are collinear and B is between A and C, then AB + BC = AC.

In this case, 2KL=KL+MN is equivalent to KL+KL=MN+KL, which satisfies the Segment Addition Postulate since KL is between MN and 2KL. Therefore, KL=MN

Read more about Line segment postulate at: brainly.com/question/37541833

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Answer:

a. subtraction property of equality

Step-by-step explanation:

Measurement is the use of numbers according to a standard. True or False

Answers

The definition of "measurement" (noun) is the use of numbers, dimensions, quantity, or capacity as ascertained by comparison with a standard. It can also refer to the act of measuring, which is a verb.

Ex 2.11
20) A curve y''=12x-24 and a stationary point at (1,4). evaluate y when x=2.

Answers

So, dy/dx=0 at the point (1, 4) - that is where x=1 and y=4.

\int { 12x-24dx } \n \n =\frac { 12{ x }^( 2 ) }{ 2 } -24x+C\n \n =6{ x }^( 2 )-24x+C

\n \n \therefore \quad { f }^( ' )\left( x \right) =6{ x }^( 2 )-24x+C

But when x=1, f'(x)=0, therefore:

0=6-24+C\n \n 0=-18+C\n \n \therefore \quad C=18

\n \n \therefore \quad { f }^( ' )\left( x \right) =6{ x }^( 2 )-24x+18

Now:

\int { 6{ x }^( 2 ) } -24x+18dx\n \n =\frac { 6{ x }^( 3 ) }{ 3 } -\frac { 24{ x }^( 2 ) }{ 2 } +18x+C

=2{ x }^( 3 )-12{ x }^( 2 )+18x+C\n \n \therefore \quad f\left( x \right) =2{ x }^( 3 )-12{ x }^( 2 )+18x+C

Now when x=1, y=4:

4=2-12+18+C\n \n 4=8+C\n \n C=4-8\n \n C=-4

\n \n \therefore \quad f\left( x \right) =2{ x }^( 3 )-12{ x }^( 2 )+18x-4

Now when x=2,

f\left( x \right) =2\cdot { 2 }^( 3 )-12\cdot { 2 }^( 2 )+18\cdot 2-4\n \n =16-48+36-4\n \n =0

So when x=2, y=0.
y''=12x-24\ny'=\int 12x-24\, dx\ny'=6x^2-24x+C\n\n0=6\cdot1^2-24\cdot1+C\n0=6-24+C\nC=18\ny'=6x^2-24x+18\n\ny=\int 6x^2-24x+18\, dx\ny=2x^3-12x^2+18x+C\n\n4=2\cdot1^3-12\cdot1^2+18\cdot1+C\n4=2-12+18+C\nC=-4\n\n 2x^3-12x^2+18x-4

y(2)=2\cdot2^3-12\cdot2^2+18\cdot2-4\ny(2)=16-48+36-4\n\boxed{y(2)=0}
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