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3 years ago

What is the slope of this graph? A −3 B 3 C 1/3 D −1/3

Mathematics

2 answers:

uranmaximum [27]3 years ago

6 0

-3, so a. if line goes down from left to right, its negative. if its going up left to right, its positive. up and down is undefined, and horizontally is zero

kakasveta [241]3 years ago

5 0

The answer to this is B.

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Determine the slope of the line that contains the given points.

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Answer:

slope = 2/3

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A set of bivariate data was used to create a least squares regression line. Which of the following is minimized by the line

77julia77 [94]

Answer:

B) The sum of the squared residuals

Step-by-step explanation:

Least Square Regression Line is drawn through a bivariate data(Data in two variables) plotted on a graph to explain the relation between the explanatory variable(x) and the response variable(y).

Not all the points will lie on the Least Square Regression Line in all cases. Some points will be above line and some points will be below the line. The vertical distance between the points and the line is known as residual. Since, some points are above the line and some are below, the sum of residuals is always zero for a Least Square Regression Line.

Since, we want to minimize the overall error(residual) so that our line is as close to the points as possible, considering the sum of residuals wont be helpful as it will always be zero. So we square the residuals first and them sum them. This always gives a positive value. The Least Square Regression Line minimizes this sum of residuals and the result is a line of Best Fit for the bivariate data.

Therefore, option B gives the correct answer.

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3 years ago

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Pls, help me it has been a missing assignment for too long :/

Natasha2012 [34]

Answer:

Snail A: 0, 5, 10, 15, 20, 25, 30

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3 years ago

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Yakvenalex [24]

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You have 24 months left until you graduate and you plan on buying yourself a new $20,000 car on graduation day. If you invest $3

shusha [124]

Answer: No, the money won't be enough to buy the car

Step-by-step explanation:

you plan on buying yourself a new $20,000 car on graduation day and graduation day is 24 months time. If you invest $300 a month for the next 24 months.

The principal amount, p = 300

He is earning 4% a month, it means that it was compounded once in four months. This also means that it was compounded quarterly. So

n = 4

The rate at which the principal was compounded is 4%. So

r = 4/100 = 0.04

It was compounded for a total of 24 months. This is equivalent to 2 years. So

n = 2

The formula for compound interest is

A = P(1+r/n)^nt

A = total amount that would be compounded at the end of n years.

A = 300(1 + (0.04/4)/4)^4×2

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A = 300(1.01)^8

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The total amount at the end of 24 months is below the cost of the car which is $20000. So he won't have enough money to buy the car

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