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Dafna1 [17]
3 years ago
9

a data set consists of these points (2, -4), (4, -7), (5, -12), Elisa found the regression equation to be y = 2.5x + 1.5 is she

correct
Mathematics
1 answer:
allochka39001 [22]3 years ago
8 0

Answer:

Not correct.

Step-by-step explanation:

If we plug in the x values into the equation we don't get anyway near to the y-values:

x = 2, y = 2.5(2) + 1.5 = 6.5 - comp[are this with y = -4 of the point(2, -4).

when x = 4, y = 11.5 ( compared with -7) and

when x = 5, y = 14 (compared with  -12).

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Citrus2011 [14]

The distance from the point S to the line A is B. 17.

Step-by-step explanation:

Step 1; First, we plot line A which is y = 22. Line A is a line that is parallel to the x-axis at a distance of 22 units. The coordinates for line A are (x, 22) which means the points on line A are (0, 22), (1, 22), (2,22), (3,22) and so on. We plot point S at (1, 5)

Step 2; If we draw a perpendicular line from point S to line A, it will be a vertical line that intersects line A at the same x coordinate as point S. So the points are S (1, 5) and (1, 22).

Step 3; To find the distance between (1, 5) and (1, 22), we use the formula

Distance = √ (x2 - x1)² + (y2 - y1)².

Distance between (1, 5) and (1, 22) where (1, 5) is (x1, y1) and (1, 22) is (x2, y2).

Distance = √ (1 - 1)² + (22 - 5)² = √ 0 + 17² = √17² = 17 units.

7 0
3 years ago
I’m very confused, my teacher did not explain well.
Sauron [17]
In order for two triangles to be considered as similar, they must be
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c) yes, because if you plus 60 and 70, you get 130. Minus 180 and 130, you get 50. So, in both triangles the angles will be 60,70 and 50; so they're equiangular
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The square of five is
Mars2501 [29]
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answer
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3 years ago
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dimaraw [331]

Answer:

First option.

Third option.

Fourth option.

Step-by-step explanation:

For this exercise is important to remember that equivalent expression have the same value.

Then given the following expression provided in the exercise:

(5x)3

You can find equivalent expression by:

-  Changing the position of 3:

3(5x)     (This matches with the first option)

- Solving the multiplication indicated. Then:

(5x)3=15x      (This matches with the fourth option)

- Writting x3 inside the parentheses:

5(x3)     (This matches with the third option)

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Brrunno [24]

Answer:

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Step-by-step explanation:

because u flip it then multiply then u get ur answer

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