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3 years ago

Which answer is the best estimate of the correlation coefficient for the variables in the scatterplot?

Mathematics

1 answer:

Yuri [45]3 years ago

8 0

-0.8 would be the best estimate.

The data seem to have a negative correlation, since they are decreasing; this means our r-value will be negative.

Our two negative choices are -0.25 and -0.8. -0.8 would be a fairly strong correlation, whereas -0.25 would be a weak correlation. The data do seem to be fairly strongly related, so we will use -0.8.

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Consider the following pair of equations: y = −2x + 8 y = x − 1 Explain how you will solve the pair of equations by substitution

Darina [25.2K]

Answer:

(3,2)

Step-by-step explanation:

y = −2x + 8

y = x − 1

Substitute the second equation into the first equation for y

y = -2x+8

x-1 = -2x+8

Add 2x to each side

x-1+2x = -2x+8+2x

3x -1 = 8

Add 1 to each side

3x-1+1 = 8+1

3x =9

Divide by 3

3x/3 = 9/3

x=3

Now find y

y = x-1

y =3-1

y=2

(3,2)

7 0

3 years ago

Read 2 more answers

What is x*x=15? (Basically make an equation that equals up to 15.)

rodikova [14]

Answer:

$\displaystyle \sqrt{15} = x$

Step-by-step explanation:

Be VERY careful. When it write out the equation that way, it will give the speculation of this:

$\displaystyle 15 = x^2$

Now, in this case, since you were extra explanatory about this [what is written in parentheses], two factors I know of that multiply to 15 are these:

** $\displaystyle 15 = 2 \times 7\frac{1}{2}$

I am joyous to assist you at any time. ☺️

3 0

4 years ago

Are the two triangles similar? How do you know?

Finger [1]

D. Yes, by AA~ :):):):)

6 0

3 years ago

Read 2 more answers

The ratio between the number of children (c) on a field trip and number of teachers (t) on the trips is 14/3. There are 70 child

Mrrafil [7]

For this case we have a relationship of the form:
$c / t = 14/3
$
There are 70 children on the field trip
Therefore, we must replace the value of c = 70 in the equation.
We have then:
$70 / t = 14/3
$
Clearing t, we have:
$t = (3/14) * (70)

t = 15$
Answer:
there are 15 teachers on the trip

3 0

4 years ago

A bank manager wants to encourage new customers to open accounts with initial deposits of at least $3000. He has posters made fo

belka [17]

Incomplete question. However, let us assume

the interest rate is 5%, and
the time is 1 year.

Answer:

$150

Step-by-step explanation:

Note, the bank manager wants new customer accounts opened with at least, $3,000. Hence we have a principal, $3000. Using the simple interest formula:

$S.I= \frac{amount*rate*time}{100}$

$SI=\frac{3000*5*1}{100}$ = $150

Therefore, the minimum amount of interest a new account would make in one year is $150.

7 0

3 years ago