Answer:
The equation of trend line is 
.
The linear trend forecast for period 8 is about 20.86.
Step-by-step explanation:
The given data table is
Period Sales
1 19
2 18
3 15
4 20
5 18
6 22
7 20
We need to find the linear trend forecast for period 8.
The general form of linear regression is
.... (1)
where, a is y-intercept and b is slope.
Using the graphing calculator we get
Substitute these values in equation (1).
The equation of trend line is .
Substitute x=8 to find the linear trend forecast for period 8.
Therefore the linear trend forecast for period 8 is about 20.86.
The two lines intersect at (0, 4) and (-4, 4)
That means when the x-value is 0 or -4, the y-value will be the same.
f(0) = g(0)
f(-4) = g(-4)
Your final answer is B.
Answer:
7. 16
8. 8
9. 8
10. 12
11. 12
12. 18
Step-by-step explanation:
The centroid cuts each median into parts in the ratio 2:1. This fact can be used to find the desired lengths.
7. SH = 2/3×SM = 2/3×24 = 16
8. HM = 1/3×SM = 1/3×24 = 8
9. TH = 2×DH = 2×4 = 8
10. HR = 2×EH = 2×6 = 12
11. TD = TH +DH = 8 +4 = 12
12. ER = EH +HR = 6 +12 = 18
Answer: she made a sign error when multiplying and should have had 256 as a final answer
Step-by-step explanation:
When multiplying negatives, it you multiply an even number of negatives, the answer is a positive. And vise versa.
Answer: the sand in the new terrarium is 2 inches deep.
Step-by-step explanation:
Zach has a terrarium with the dimensions of 20 by 8 and the terrarium was filled with 3 inches of sand. It means that the volume of sand that this terrarium contains is
20 × 8 × 3 = 480 inches³
Zach gets a new terrarium that is larger with the dimensions of 10 by 24. If Zach moved the existing sand in the new terrarium and the height of the sand is represented by h, then the volume of sand into he new terrarium is
10 × 24 × h = 240h
Since the volume of sand in both terrariums is equal, then
240h = 480
h = 480/240
h = 2 inches
