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The following units of an inventory item were available for sale during the year.

Beginning inventory
10 units at
$55

First purchase
25 units at
$60

Second purchase
30 units at
$65

Third purchase
15 units at
$70

The firm uses the periodic inventory system. During the year, 60 units of the item were sold.
The ending inventory cost using LIFO is

The following units of an inventory item were available for sale during the year. $\newline$ \begin{tabular}{ll} $\newline$ Beginning inventory & $10$ units at $\$ 55$ \\ $\newline$ First purchase & $25$ units at $\$ 60$ \\ $\newline$ Second purchase & $30$ units at $\$ 65$ \\ $\newline$ Third purchase & $15$ units at $\$ 70$ $\newline$ \end{tabular} $\newline$ The firm uses the periodic inventory system. During the year, $60$ units of the item were sold. $\newline$ The ending inventory cost using LIFO is

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Interpret regression lines

Full solution

Q. The following units of an inventory item were available for sale during the year.

\newline

\begin{tabular}{ll}

\newline

Beginning inventory &

10

units at

\$ 55

\\

\newline

First purchase &

25

units at

\$ 60

\\

\newline

Second purchase &

30

units at

\$ 65

\\

\newline

Third purchase &

15

units at

\$ 70

\newline

\end{tabular}

\newline

The firm uses the periodic inventory system. During the year,

60

units of the item were sold.

\newline

The ending inventory cost using LIFO is

Identify slope of regression line: Identify the slope of the regression line from the equation $y = 0.886x - 23.764$ .
Interpret slope meaning: Recognize that the slope, $0.886$ , represents the change in the number of songs named for each additional year of age.
Calculate increase in songs: Calculate the increase in the number of songs named for a one-year increase in age using the slope.

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Read the following description of a data set. Rod Diamond is a singer who appeals to an older demographic. For a comedy segment on a late night show, he asked random people on the street how old they were and how many of his songs they could name, if any. Rod noted the age of each person he spoke with,

x

, and the number of songs each could name,

y

. The least squares regression line of this data set is:

y = 0.886x - 23.764

Complete the following sentence: The least squares regression line predicts that if a person is one year older, they will be able to name

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Each of these relationships reflects a correlation. Which relationship most likely reflects both correlation and causation?

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A large truck, traveling

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\frac{60}{30} a+\frac{60}{10} b=24

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30 a+10 b=24

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170-20 c=5

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170+20 c=5

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170-15 c=5

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170+15 c=5

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(A) New Mexico residents

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A writer for a high school newspaper is conducting a survey to estimate the number of students that will vote for a particular candidate in an upcoming student government election. All students at the high school are eligible to vote in the election, and the writer decides to select a sample of students to take the survey. Which of the following sampling methods is most likely to produce valid results?

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\newline

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In which of the following scenarios can the decline of Littleroot Town's population be described as linear?

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1

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2.5 \%

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(B) Each year, an increasing number of people leave Littleroot Town.

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(C) Each year, a decreasing number of people leave Littleroot Town.

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Based on her research, Aria estimates that

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\newline

1

\newline

70 \%

80 \%

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70 \%

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3 \mathrm{~kg}

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2 \mathrm{~kg}

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The penguin gained

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between January and February.

\newline

Which animal had the least amount of change in weight?

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1

\newline

\newline

\newline

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A small accounting firm has

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000

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5^{\text {th }}

accountant who earns

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\newline

How will hiring the

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(B) Both the mean and median will decrease, but the mean will decrease by more than the median.

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