Mathematics, 23.07.2019 08:00 sarahsompayrac

Which of the following is a number that is used to describe how two random variables are related

Answers: 1

Show answers

Answers

The correlation coefficient, often denoted by the lower case letter r, is a number used to describe the relationship between two variables. The correlation coefficient is a number between -1 and 1.

Let's call the variables A and B.

If as A goes up, B goes up then there is a positive correlation between A and B. Here the correlation coefficient would be positive. the closer it is to 1 the stronger the relationship between the two variables. One example of two variables that have a strong positive correlation is height and shoe size. As height increases so does shoe size.

If as A goes up B goes down and vice versa then there is a negative correlation. The closer to -1 the correlation coefficient is the stronger the correlation. Two variables that are negatively correlated are temperature and and swim suits sold. As the temperature increases the sale of swim suits decreases.

If there is no relationship between the variables then the correlation coefficient is 0.

Answer from: Quest

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )

Which of the following is an equation of a parallel to the equation y=4x+1?

Answer from: Quest

the equation of the parallel line would be y = 2x + 9

step-by-step explanation:

to start we need to find the slope of the original line. we can do that by looking at the coefficient of x, which is 2

since the slope of the original line is 2 and parallel lines have the same slope, we know the new line will also have 2 slope. now we can use that along with the point given in point-slope form to get the find equation.

y - y1 = m(x - x1)

y - 5 = 2(x + 2)

y - 5 = 2x + 4

y = 2x + 9

Another question on Mathematics

Mathematics, 21.06.2019 15:30

Find the vertex of the function given below y=x^2-6x+1

Answers: 2

Answer

Mathematics, 21.06.2019 16:00

If f(x)=x^3 and g(x)=2x+7 when g(x)=-5

Answers: 2

Answer

Mathematics, 21.06.2019 17:00

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Answers: 1

Answer

Mathematics, 21.06.2019 19:00

Amodel rocket is launched from a roof into a large field. the path of the rocket can be modeled by the equation y = -0.04x^2 + 8.6x + 4.8, where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters, of the rocket above the ground. how far horizontally from its starting point will the rocket land? a. 0.56 m b. 215.56 m c. 431.11 m d. 215.74 m

Answers: 1

Answer

You know the right answer?

Which of the following is a number that is used to describe how two random variables are related...

Questions