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s2008m [1.1K]
3 years ago
15

A regression analysis between sales (in $1000s) and price (in dollars) resulted in the following equation: ŷ = 50,000 − 8x The a

bove equation implies that an increase of _____. a. $8 in price is associated with an increase of $8,000 in sales b. $1 in price is associated with a decrease of $8,000 in sales c. $1 in price is associated with a decrease of $42,000 in sales d. $1 in price is associated with a decrease of $8 in sales
Mathematics
1 answer:
andrew-mc [135]3 years ago
8 0

Answer:

b. $1 in price is associated with a decrease of $8,000 in sales

Step-by-step explanation:

Linear function:

A linear function has the following format:

y = mx + b

In which m is the slope, which represents by how much y changes when x changes by 1.

ŷ = 50,000 − 8x

This means that m = -8, in thousands of dollars, so when the price x increases by 1, the sales will be decrease by $8,000, and thus, the correct answer is given by option b.

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Mrrafil [7]

Answer:

x=1.5

or

x=1 1/2

Step-by-step explanation:

4x-7>-1

add 7 to both sides

4x=6

divide by 4 on both sides

x=1.5

or

x=1 1/2

5 0
2 years ago
If Neil Works 3/4 of an hour on Monday and 6/10 of an hour on Tuesday how much time will she work altogether?
jek_recluse [69]

Answer:

C

Step-by-step explanation:

3/4 + 6/10

Find a common denominator and find what you multiply to each denominator to get that number and multiply the numerator by the same amount

(3/4 * 5/5) + (6/10 * 2/2)=

15/20 + 12/20

Then add

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Then finally convert to mixed number

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2 years ago
Your personal library contains books written by 165 authors. 60% of the authors are men. 40% of the authors write only nonfictio
Ludmilka [50]
Lets discern the infomation:

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so there are 99 men

non_fiction = 165 * 0.4 = 66

so 66 authors write non-fiction.

men writing non-fiction are 40, so 59 men write fiction, and 26 women write non-fiction.

probability of author non-fiction or man?
non-fiction: 40 men + 26 women = 66 total
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so in total 99 man + 26 women = 115 authors

hence the probability is:
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3 0
3 years ago
Original price $90 markdown 24%​
Gre4nikov [31]
The markdown will be $21.60. so the final price after the markdown is $68.40.
8 0
2 years ago
Solve for x <br>4^x/9^x=½<br>​
kirill115 [55]

Answer:

x = 0.85476

Step-by-step explanation:

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9ˣ / 4ˣ = 2

(9/4)ˣ = 2

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log₂.₂₅2 = x

x = 0.85476

3 0
3 years ago
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