Answer:
The answer is C, -6/5
Answer:
Correct answer is option d. increase of $1 in advertising is associated with an increase of $4000 in sales.
Step-by-step explanation:
Given the equation of regression analysis is given as:
where 
is the cost on advertising in Dollars.
and 
is the sales in Thousand Dollars.
To find:
The correct increase in sales when there is increase in the advertising cost.
Solution:
Suppose there is an increase of 
in the advertising cost.
Let the initial cost be then the cost will be 
.
Initial sales
....... (1)
After increase of $1 in advertising cost, final cost:
Subtracting (2) from (1) to find the increase in the sales:
The units of sales is Thousand Dollars ($1000).
So, increase in sales = 
So, correct answer is:
d. increase of $1 in advertising is associated with an increase of $4000 in sales.
Answer:
1,120 rooms
Step-by-step explanation:
You need to find out how many hotel rooms are on one floor, and then multiply that by 28. So each room is 16ft x 28ft, which comes out to be 448ft^2. Then to find how many of these rooms go onto one floor, you must divide 18,000 by 448. This equals about 40. So 40 rooms per floor, times 28 floors is: 1,120. And that's your answer! Make sure you understand how we got that. If you have any questions I can help! :)
Answer: y varies directly as x ", " y varies proportionally as x ", or " y is directly proportional to x . ") This means that as x increases, y increases and as x decreases, y decreases—and that the ratio between them always stays the same.
Step-by-step explanation:
Answer:
x = -7
Step-by-step explanation:
-7x + 2 = 51
-7x = 51 - 2
-7x = 49
x = -7
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