Answer:
Option (4)
Step-by-step explanation:
Table for the points from the graph attached,
x y xy
2.2 1.8 4.84 3.24 3.96
3.2 1.8 10.24 3.24 5.76
3.6 3 12.96 9 10.8
4.8 3.5 23.04 12.25 16.8
5.2 6.2 27.04 38.44 32.24
6.4 4.5 40.96 20.25 28.8
7.5 7.8 56.25 60.84 58.5
8.5 6.2 72.25 38.44 52.7
n = 8
Formula for the correlation coefficient
r =
r =
r =
r = 0.87
r ≈ 0.9
Therefore, Option (4) is the answer.
p = 3r + 2s
p - 3r = 2s <em>subtract 3r from both sides</em>
(p - 3r)/2 = s <em>divide both sides by 2</em>
Answer: (p - 3r)/2
Initial start: $158
purchased 7 books
Money left after purchase: $18
158-18= $140
$140/7 books
= $20 per book
Answer:
n+(n+2)+20=4n
Step-by-step explanation:
Let the smaller integer be n,
the bigger odd integer will be n+2.
n+(n+2)+20=4n
2n+22=4n
2n=22
n=11