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3 years ago

Which expression can be simplified to find the slope of the trend line in the scatterplot?

Mathematics

2 answers:

bazaltina [42]3 years ago

8 0

Answer: 35-21/8-4

Step-by-step explanation:

Nutka1998 [239]3 years ago

3 0

Answer: $\frac{35-21}{8-4}$

Step-by-step explanation:

The slope of a line equals to the difference between points' y-coordinates divided by the difference between their x-coordinates.

That is, if $(x_1,y_1)$ and $(x_2,y_2)$ are the point of a line,

Then the slope of the line is,

$m=\frac{y_2-y_1}{x_2-x_1}$

By the given diagram,

$x_1=4$ , $y_1=21$ , $x_2=8$ and $y_2=35$

Thus, the slope of the given line

= $\frac{35-21}{8-4}$

⇒ Fourth option is correct.

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4 years ago

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3 years ago

Which statement describes the relationship between labor cost and time for a car repair?

Nimfa-mama [501]

Answer:

Option A is correct.

Step-by-step explanation:

As we see the graph, we can say that the correct statement is :

A.)All repairs requiring 1 hour or less have the same labor cost. We can see that the coat from 0 hours to 1 hour is $50. So, the number of hours falling in this range has the same repairing cost.

B.) Labor costs the same no matter how many hours are used for a repair. This is wrong as the graph is increasing after 1 hour.

C.) Labor costs for a repair are more expensive as the number of hours increases. This is wrong as the hours are increasing from 0.25 to 0.5 then to 0.75 but they all have the same cost.

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7 0

3 years ago

9 - 10x = 2x + 1 - 8x

Furkat [3]

Answer:

$x=2$

Step-by-step explanation:

$9 - 10x = 2x + 1 - 8x$

$9-10x=-6x+1$

Subtract 9 from both sides:

$9-10x-9=-6x+1-9$

$-10x=-6x-8$

Add 6x to both sides:

$-10x+6x=-6x-8+6x$

$-4x=-8$

Divide both sides by -4:

$\frac{-4x}{-4}=\frac{-8}{-4}$

$x=2$

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4 years ago

Read 2 more answers

Select the correct answer.

Marina CMI [18]

The concept of historical cost in accounting involves valuing business resources at their purchase price. This is further explained below.

<h3>What is the historical cost?</h3>

Generally, historical cost is a value of measure used in accounting that records the value of an asset on the balance sheet at its original cost when purchased by the firm.

In conclusion, valuing business resources at their purchase price is what historical cost is about.