Which characteristic of a data set makes a linear regression model unreasonable? a slope close to 0 a correlation coefficient close to 0 a slope close to –1 a correlation coefficient close to –1

Answers

Answer 1

Answer:

Answer:

A correlation coefficient close to zero

Step-by-step explanation:

This makes linear regression unreasonable because the correlation coefficient shows how related the data points are, -1 and 1 being very strong and 0 being uncorrelated. So the line of best fit would not make sense because the data points are random in relation to one another.

Answer 2

Answer:

Answer: B. A correlation coefficient close to zero

Step-by-step explanation:

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Sally needs to have some drywall and insulation work done in her house. She has received a quote from a professional drywall contractor to complete her repairs for $1,200. Her neighbor Steve says he can complete the same job for $800. Sally could use a credit card to pay the contractor, but Steve can only accept cash. Sally’s credit card has a 14% APR for credit purchases and a 32% interest rate for cash advances. Expecting to pay $50 of the principle plus appropriate interest each month, Sally estimates that it would take her 24 months to pay off the contractor balance and 16 months to pay off the cash advance balance. In the end, would it be cheaper for Sally to hire the contractor or her neighbor to complete the repairs?
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Find the number of permutations in the word “arithmetic”.3,628,800907,200834,200700,123

Removing which ordered pair from the table would make the relation a function of X

Answers

Answer: The answer is D

Step-by-step explanation:

A function is a relation that for each input value x takes the unique value of output y.

Consider the table

You can see that x=4 takes two different values y=7 and y=1. You should remove one of these ordered pairs (4,7) or (4,1)

What is the area of a rectangle with a height of 3X and a width of 2X -3

Answers

Answer:6x^2 -9x

Step-by-step explanation:

6x2-9x would be the correct answer

log8 (x(x + 6)) = log8 (5x+12)

Please help me!

Answers

As log8(x(x+6)) = log8(5x+12) we can raise e by each side this getting x^2 + 6x = 5x + 12
x^2 + x - 12 = 0
(x+4)(x-3)=0
x=3, x=-4
However we can only do logs of positive number and when -4 is substituted into the equation it gives a negative number so the only true solution is x=3

What is square root of 80 in simplified radical form?A.8 square root over 10

B.10 square root over 8

C.5 square root over 4

D.4 square root over 5

Answers

The number √80 in simplified radical form is 4√5. Therefore, the correct answer is option D.

The given number is √80.

Radical form is the expression that involves radical signs such as square root, cube root, etc instead of using exponents to describe the same entity.

Here, factors of number 80 are 2×2×2×2×5

= √16×5

= 4√5

Therefore, the correct answer is option D.

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square root 80 = 4 x square root 5
because root 80 = root 16 x root 5

Can someone help me it’s geometry :(

Answers

Answer:

Step-by-step explanation:

3) ∠JKN =∠ MKL Vertical angles theorem - Vertically opposite angles are equal

4) ΔJKN ≅ΔMKL AAS congruency

5) ∠J ≅ ∠ M CPCTC

Answer:

The vertical angles theorem

Step-by-step explanation:

The correct answer is the vertical angles theorem, which states that vertical angles, angles that are opposite each other and formed by two intersecting straight lines, are congruent

A hot dog vendor has determined that the number of hot dogs he sells per day is inversely proportional to the price he charges. The vendor wants to decide if increasing his price by 55 cents will drive away too many customers. On average, he sells 200 hot dogs a day at a price of $3.85 per hot dog. How many hot dogs can he expect to sell if the price is increased by 55 cents? Round your answer to the nearest hot dog.

Answers

Answer:

175 hot dogs

Step-by-step explanation:

The new price will be $3.85 + 0.55 = $4.40. Since the price has increased by a factor of 4.40/3.85 = 8/7, the number of hot dogs sold, which is inversely proportional, will be ...

(7/8)·200 = 175 . . . hot dogs sold at the higher price

Final answer:

The vendor can expect to sell approximately 233 hot dogs if the price is increased by 55 cents.

Explanation:

To determine how many hot dogs the vendor can expect to sell if the price is increased by 55 cents, we can use the inverse proportionality relationship between the number of hot dogs sold and the price charged.

First, let's set up a proportion with the initial price and number of hot dogs sold:

$3.85 / 200 = (new price + $0.55) / x

Next, we can cross multiply and solve for x:

x = (200 * ($3.85 + $0.55)) / $3.85

Calculating this expression gives us a value of x ≈ 233.77.

Since the number of hot dogs sold must be a whole number, we round down to the nearest whole number, giving us an estimated value of 233 hot dogs.

Learn more about Hot dog vendor here:

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