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DedPeter [7]
3 years ago
7

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:

<u>$150</u>

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 <em>minimum</em> amount of interest a new account would make in one year is <u>$150.</u>

7 0
3 years ago
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