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3 years ago

On a scatter plot, what does it mean when both variables are increasing?

Mathematics

2 answers:

Natasha_Volkova [10]3 years ago

8 0

It means that the correlation of the variables is increasing.

andrew-mc [135]3 years ago

6 0

Scatter plots show how much one variable is affected by another. The relationship between two variables is called their correlation.

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A researcher measures the IQ scores of a group of college students. What four things will the researcher use statistics for

Alik [6]

Answer:

1. IQ range

2. Frequency

3. Mean

4. Standard deviation and variance

Step-by-step explanation:

To use statistics the researcher must determine the standard deviation, mean and variance. He will need the following to calculate the mean:

1. The IQ score range and the frequency of the range.

To calculate the standard deviation and mean:

1. Need the mean and frequency of the IQ scores

Therefore the 4 things needed is:

1. IQ range

2. Frequency

3. Mean

4. Standard deviation and variance

7 0

4 years ago

Determine which ordered pair is a solution of y=-5x-1 a. (9, –2) b. (5, 24) c. (–1, 6) d. (–4, 19)

Akimi4 [234]

(x, y)

y = -5x - 1

a. (9, -2) → x = 9, y = -2

-2 = -5(9) - 1

-2 = -46 FALSE

b. (5, 24) → x = 5, y = 24

24 = -5(5) - 1

24 = -26 FALSE

c. (-1, 6) → x = -1, y = 6

6 = -5(-1) - 1

6 = 4 FALSE

d. (-4, 19) → x = -4, y = 19

19 = -5(-4) - 1

19 = 19 TRUE

<h3>Answer: d. (-4, 19)</h3>

6 0

4 years ago

A rectangular field will be fenced on all four sides. Fencing for the north and south sides costs $5 per foot and fencing for th

Vesnalui [34]

The answer is "141.17647058823529411764705882353", hope this helps! Please Mark me the brainliest! ☺

4 0

3 years ago

Solve 11 + 4x = 2x + 21 for x

makkiz [27]

Isolate the variable by dividing each side by factors that don't contain the variable.

x=5

7 0

3 years ago

The length of a rectangle is 3 cm greater than the width of the rectangle.

professor190 [17]

Answer:

B) 8 cm

Step-by-step explanation:

Hello, I can help you with this

according to the question

The length of a rectangle is 3 cm greater than the width of the rectangle.

convert this into algebraic terms

Step 1

do the eqution

Let

W,width

L,Length

The length of a rectangle(L) is(=) 3 cm greater than the width (W+3) of the rectangle.

note:3 cm greater than the width (W+3) means that you need add 3 to the width to obtain the length

L=W+3 equation(1)

the area of the rectangle is 40 square cm

Let

A,Area

Area= 40 cm

A=40

also,A=L*W

40=L*W equation(2)

Step 2

solve the equations

L=W+3 equation(1)

40=L*W equation(2)

replace the value of L from equaiton (1) into equation (2)

$40=(W+3)*W\\40=W^{2} +3W\\W^{2} +3W-40=0\\W^{2}+3W-40=0\\\\use cuadratic\\\\w=\frac{-b+-\sqrt{b^{2}-4ac } }{2a}\\\\w=\frac{-3+-\sqrt{3^{2}-4*1*-40 } }{2*1}\\w=\frac{-3+-\sqrt{169} }{2}\\$

we are looking for a distance, so we need the positive valur only.

$w=\frac{-3+-\sqrt{169} }{2}\\\\w=\frac{-3+13}{2}\\ w=5\\$

Step 3

Now, replace the value of W into equation (1) to obtain the length

L=W+3 equation(1)

L=5+3

L=8

so, the length is 8 cm, B) 8 cm

Have a nice day.

3 0

3 years ago