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Ksivusya [100]
2 years ago
8

How do you apply your knowledge about correlation and causation to real life?

Mathematics
1 answer:
ra1l [238]2 years ago
7 0

Answer:

Both positive correlations and negative correlations (when one variable increases as the other decreases) can be found everywhere you look. For example, when you spend more time in sunlight, your chances of getting a sunburn also go up. More examples of positive correlations include:

The more time you spend running on a treadmill, the more calories you will burn.

The longer your hair grows, the more shampoo you will need.

Step-by-step explanation:

21,23,23,27,29,29,33,33,34,36,37,38,39,40,41,43,44,45,56,56

The minimum is the lowest number in the data set. Since it is listed from smallest to largest, we know that the minimum is 21. The median is the middle number. Cancel out 9 numbers from each side and add the two numbers 36+37 then divide the answer by 2 to get the median.Therefore, the median is 36.5

The maximum is the highest number in the data set; it is 56.

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Suppose it is found that a certain model of car sells y= -1.6(x-2)^2 + 4.8(x-2) + 16 cars per week, where x is the number of sho
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Answer:

Approximately 4 shops would be the best number of shops which the car is sold, and the number of cars is 20.

Step-by-step explanation:

This is a quadratic function. Therefore, the first thing you need to do is assume some values for x, and then, calculate the value of y, (which would be the number of cars sold). In this way, you can do the graph.

Watch the following attachment, which is a document of excel, showing the graph and some values of x, that I assume

Now, even if you don't have the graph you can estimate the number of shops with the following expression of the summit:

X = -b / 2a

Where:

a: number that goes along with the x elevated.

b: number that goes along with the x, but without being elevated.

In this equation, the first thing we need to do, is rearrange it, that's because we have a (x-2) in the equation, and this could be really annoying.

First let's solve the (x-2)^2

(x-2)^2 = (x-2)(x-2) = x^2 - 2*2x + 2^2 = x^2 - 4x + 4

This is now multiplied by -1.6:

-1.6x^2 + 6.4x - 6.4

Now, multiply 4.8 by x-2:

4.8x - 9.6

Finally, let's arrange this:

-1.6x^2 + 6.4x - 6.4 + 4.8x - 9.6 + 16

-1.6x^2 + 11.2x - 6.4 - 9.6 + 16 = -1.6x^2 + 11.2x

This means that the graph do not have a "y" intercept, and the values of a and b are -1.6 and 11.2, therefore, we can estimate the best number of shops, calculating the summit of the graph (This is because s a quadratic function, and the graph is a parable, and the minimum or maximum point of the graph is reached in the summit)

Summit has X and Y values, the x value is (see formula above):

X = -11.2 / 2 * -1.6 = 3.5

and for the y value, just replace the X value in the equation:

Y = -1.6(3.5)^2 + 11.2(3.5) = -19.6 + 39.2 = 19.6

With this we can conclude that the best number of shops that sells this model of car, is 4 (rounded) and they all sell 20 cars (also rounded). See the graph below in the attachment.

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