Answer:
option D
Step-by-step explanation:
m=slope
m=(y2-y1)/(x2-x1)
m=(10-4)/(6-2)
m=6/4
m=3/2
Using correlation coefficients, it is found that the -0.63 correlation between number of absences and final exam score means that there is a strong negative correlation between number of absences and final exam score.
<h3>What is a correlation coefficient?</h3>
It is an index that measures correlation between two variables, assuming values between -1 and 1.
If it is positive, the relation is positive, that is, they are direct proportional. If it is negative, they are inverse proportional.
If the absolute value of the correlation coefficient is greater than 0.6, the relationship is strong.
In this problem, the correlation is of -0.63, hence:
It means that that there is a strong negative correlation between number of absences and final exam score.
To learn more about correlation coefficients, you can take a look at brainly.com/question/25815006
Answer:
5 or 45
Step-by-step explanation:
If the first term is "a" and the common ratio is "r", then the first three terms are ...
a, ar, ar²
Their product will be ...
a × ar × ar² = (ar)³ = 3375
ar = ∛3375 = 15
Their sum will be ...
a + ar + ar² = 65 = 15/r + 15 + 15r
Subtracting 15 and multiplying by r/5, we have the quadratic in r:
10r = 3 + 3r²
3r² -10r +3 = 0 . . . . in standard form
(3r -1)(r -3) = 0 . . . . factored
r = 1/3 . . or . . 3 . . . . values of r that make the factors zero
The first term is 15/r = 45 or 5
_____
The first three terms could be 5, 15, 45; or they could be 45, 15, 5.
Step-by-step explanation:
4.
3pounds for $6.99
a.
1 pounds =$6.99/3=$2.33
b.
10 pounds =10×$2.33=$23.3
10.
area right triangle =1/2 bh=1/2 ×{50×30}=750mm²
