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earnstyle [38]
3 years ago
11

A random sample of records of electricity usage of homes in the month of July gives the amount of electricity used and size (in

square feet) of 135 homes. A regression was done to predict the amount of electricity used (in kilowatt-hours) from size. The residuals plot indicated that a linear model is appropriate. The model is usage = 1254 + 0.7 size. What would a negative residual mean for people living in a house that is 2284 square feet?
(A) They are using more electricity than expected.

(B) Their house is smaller than expected.

(C) Their house is bigger than expected.

(D) They are using the least amount of electricity of all of the houses sampled.

(E) They are using less electricity than expected.
Mathematics
2 answers:
erica [24]3 years ago
7 0

Answer:

<h2>(E) They are using less electricity than expected.</h2>

Step-by-step explanation:

The given model is

usage=1254 +0.7(size)

Their hous is 2284 square feet, so

usage=1254+0.7(2284)=2852.8

As you can observe they are using 2852.8 kilowatts.

If there's a negative residual, that would mean they are below the average or the expected usage.

Therefore, the right answer is E.

pickupchik [31]3 years ago
6 0

Answer:

E) They are using less electricity than expected.

Step-by-step explanation:

The residual mean value is the observed value minus the predicted or expected value. If it is negative it means that the expected value of electricity usage is higher than the observed electricity usage value, so they are using less electricity than expected.

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luda_lava [24]

Answer:

Step-by-step explanation:

The answer is 48 feet because 4x6=24 and 24x2=48

4 0
2 years ago
Mr. Perrins’s class sold packs of peanut butter cookies for $2.35 each and Mr. Woods’s class sold bottles of milk for $1.34 each
sergey [27]

Answer:

1. Solution = (4,3) and they intersect.

2. Solution = Infinite, this means that the lines overlap each other constantly.

3. Equations = x + y=73 and 2.35x + 1.34y = 141.25

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Step-by-step explanation:

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6 0
2 years ago
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A rectangle is four times as long as it is wide. If its length were diminished by 6 meters and its width were increased by 6 met
valkas [14]

Answer:

Length equals 16 and Width equals 4

Step-by-step explanation:

First let us create an equation. We can use L and W for length and width.

If the length is 4 times the width, then we end up with: L = 4W

It then says, " If its length were diminished by 6 meters and its width were increased by 6 meters, it would be a square."

Since a square has an equal length and width then we end up with:

L - 6 = W + 6

Knowing this we can just substitute the first equation into the second one leaving us with: 4W - 6 = W + 6

We then remove a W from both sides so that the right side is left with a 6, and add 6 to both sides to remove the -6 from the left one.

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7 0
1 year ago
Find the value of x that makes the triangle a right triangle.
gogolik [260]

Answer:

Hi, I don't see an attachment with your question. But without any attachments to refer to. You use Pyrhagoras Theorem to solve this question.

Step-by-step explanation:

A^2 (Short side) + B^2 (Short side) = C^2 (Long side)

Stay safe and Merry Christmas! :)

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2 years ago
What is the multiplicative rate of change for the exponential function graphed to the left​
kifflom [539]

Looking at the given points on the right side from (0,2) to (1,6) for 1 increase in X ( 1-0=1) the Y value increases by 3 ( 6/2 = 3)

This same increase happens for th other two points: 18/6 = 3

54 / 18 = 3

The rate of increase is 3.

6 0
2 years ago
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