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Find the distance between [tex]\((1, 3)\)[/tex] and [tex]\((4, -1)\)[/tex].

A. 5
B. 25
C. [tex]\(\sqrt{13}\)[/tex]
D. None of these

Sagot :

To find the distance between the two points [tex]\((1, 3)\)[/tex] and [tex]\((4, -1)\)[/tex], we can use the distance formula. The distance formula calculates the straight-line distance between two points in a plane and is given by:

[tex]\[ d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} \][/tex]

Let's go through the steps to find this distance:

1. Identify the coordinates of the points:
- Point 1: [tex]\((x_1, y_1) = (1, 3)\)[/tex]
- Point 2: [tex]\((x_2, y_2) = (4, -1)\)[/tex]

2. Calculate the differences in [tex]\(x\)[/tex] and [tex]\(y\)[/tex] coordinates:
- Difference in [tex]\(x\)[/tex] coordinates:
[tex]\[ \Delta x = x_2 - x_1 = 4 - 1 = 3 \][/tex]
- Difference in [tex]\(y\)[/tex] coordinates:
[tex]\[ \Delta y = y_2 - y_1 = -1 - 3 = -4 \][/tex]

3. Square the differences:
- Square of the difference in [tex]\(x\)[/tex] coordinates:
[tex]\[ (\Delta x)^2 = 3^2 = 9 \][/tex]
- Square of the difference in [tex]\(y\)[/tex] coordinates:
[tex]\[ (\Delta y)^2 = (-4)^2 = 16 \][/tex]

4. Sum the squares of the differences:
[tex]\[ (\Delta x)^2 + (\Delta y)^2 = 9 + 16 = 25 \][/tex]

5. Take the square root of the sum to find the distance:
[tex]\[ d = \sqrt{25} = 5 \][/tex]

Therefore, the distance between the points [tex]\((1, 3)\)[/tex] and [tex]\((4, -1)\)[/tex] is [tex]\(5\)[/tex].

The correct answer is [tex]\(\boxed{5}\)[/tex].