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Sergio039 [100]
2 years ago
15

A graph titled Monthly Sales and Advertising Costs has Advertising Costs (1,000 dollars) on the x-axis and sales (1,000 dollars)

on the y-axis. A line goes through points (6.4, 117) and (6.6, 120).
The scatterplot and trend line show a positive correlation between advertising costs and sales.
Using the points (6.4, 117) and (6.6, 120), what is the slope of the trend line?
–15
–12
12
15
Mathematics
2 answers:
daser333 [38]2 years ago
8 1

AnswBrainly User

When x = 6.4, y=117, therefore

15*6.4 + b = 117

b = 117 -  96 = 21

Confirm this value by checking (6.6, 120).

15*6.6 + 21 = 120 (Correct)

Answer: b = 21

Step-by-step explanation:

Brianna bts
2 years ago
wrong
kenny6666 [7]2 years ago
7 0

Answer:

The real answer is 15.

Step-by-step explanation:

The kid above me thought they were smart using the old copy and paste method, and they did it from a completely different question. As you can tell, 21 isn't even an option, so 15 is the answer.

Brianna bts
2 years ago
correct tthank you
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cricket20 [7]

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The "law of cosines" relates the lengths of the sides of any
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To find angle-B, the law of cosines says

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B  =  angle-B
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Add  3.8 cos(B)  from each side:

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Subtract  1.96  from each side:

                             3.8 cos(B) =  2.65

Divide each side by  3.8 :

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Whipping out the
trusty calculator:
                                 B  = the angle whose cosine is 0.69737

                                      =  45.784° .

Now, for the first time, I'll take a deep breath, then hold it
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By gosh !  Choice 'B' is  45.8° !                    yay !
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