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Katen [24]
3 years ago
8

Suppose the linear regression line y = 2.1x + 130 predicts sales based on the money spent on advertising. If x represents the do

llars spent in advertising, and y represents the company sales in dollars, about how much can the company expect in sales if it spends $50 in advertising?
Mathematics
1 answer:
hoa [83]3 years ago
4 0
We have here a simple linear regression since it involves 1 dependent variable and 1 independent variable. Linear regression is used to present the relationship between variables. In the problem, given the equation y = 2.1x + 130, we are looking for the amount  the company expect in sales if it spends $50 in advertising? We will have a direct substitution on the given equation using x = $50.The answer will be $235  - it is the expected sales at $50 spent on advertising .
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Using the chart, find the equation from the relation.
lara [203]

Answer:

-4

Step-by-step explanation:

y = x +b

6= 10 + b

b = 6 - 10

b = -4

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2 years ago
A grocery store has a limited the amount of pecans that each customers can purches. a customer will be allowed to buy no more th
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C 32 ounces is the answer

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Graph the system of inequalities. Show at least two points for each inequality. (Lesson 1.08)
rjkz [21]

The inequalities and the points are

  • y + 2 ≤ 5x: (5, -2) and (10, 1)
  • y + x > -4: (5, -2) and (10, 1)
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<h3>How to graph the system of inequalities?</h3>

The system of inequalities is given as:

y + 2 ≤ 5x

y + x > -4

y ≤ 1/3x

Next, we plot each inequality in the system of inequalities using a graphing calculator

See attachment for the graph of the system of inequalities y + 2 ≤ 5x, y + x > -4 and y ≤ 1/3x

From the attached graph, we have the following points:

y + 2 ≤ 5x: (5, -2) and (10, 1)

y + x > -4: (5, -2) and (10, 1)

y ≤ 1/3x: (5, -2) and (10, 1)

Read more about inequalities at:

brainly.com/question/24372553

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5 0
2 years ago
In his​ motorboat, Bill Ruhberg travels upstream at top speed to his favorite fishing​ spot, a distance of 270 ​mi, in 5 hr.​ Re
stellarik [79]

Answer:

D = rate x time

 

D = (rate of current + rate of boat) x time

 

168 = (y - x) t against the current trip upstreams

168 = (y + x) t with the current trip downstream

 

168 = (y - x) 4

168 = (y + x) 3.5

 

since 168 = 168, we can set the equations equal to each other:

 

(y - x)4 = (y+x)3.5

4y - 4x = 3.5y +3.5x

4y - 3.5y = 3.5x + 4x

0.5y = 7.5x

y =15x

 

the rate of the current is 15 times the rate of the boat.

168 =4(15x) - 4x

168 = 60x - 4x

168 = 56x

x = 3

 

y = 15x

y = 15(3)

y = 45

 

Step-by-step explanation:

4 0
3 years ago
A line passes through the points (p, a) and (p, –a) where p and a are real numbers and p ≠ 0. Describe each of the following. Ex
PolarNik [594]
Since the x-coordinate does not change, we know immediately that this straight line is a vertical one.  It does not have a slope (div. by zero is undefined).

The equation of this vertical line is x=0.  

The line has no y-intercept.

A line perpend. to the given line has a slope of 0.
7 0
3 years ago
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