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Find the slope of the line passing through the points [tex]$(9,-4)$[/tex] and [tex]$(3,-9)$[/tex].

A. [tex]\square[/tex]
B. [tex]\square[/tex]
C. Undefined


Sagot :

To find the slope of the line passing through the points [tex]\((9, -4)\)[/tex] and [tex]\((3, -9)\)[/tex], we will use the slope formula:

[tex]\[ m = \frac{y_2 - y_1}{x_2 - x_1} \][/tex]

Here, [tex]\((x_1, y_1) = (9, -4)\)[/tex] and [tex]\((x_2, y_2) = (3, -9)\)[/tex].

Step-by-step solution:

1. Identify the coordinates of the two points:
- First point [tex]\((x_1, y_1) = (9, -4)\)[/tex]
- Second point [tex]\((x_2, y_2) = (3, -9)\)[/tex]

2. Substitute the coordinates into the slope formula:

[tex]\[ m = \frac{y_2 - y_1}{x_2 - x_1} \][/tex]

3. Calculate the differences in the y-values and x-values:
- [tex]\(y_2 - y_1 = -9 - (-4) = -9 + 4 = -5\)[/tex]
- [tex]\(x_2 - x_1 = 3 - 9 = -6\)[/tex]

4. Substitute these values back into the slope formula:

[tex]\[ m = \frac{-5}{-6} \][/tex]

5. Simplify the fraction:

[tex]\[ m = \frac{5}{6} \][/tex]

Thus, the slope of the line passing through the points [tex]\((9, -4)\)[/tex] and [tex]\((3, -9)\)[/tex] is [tex]\(\frac{5}{6}\)[/tex].

So, the correct numerical representation in decimal form is:

[tex]\[ m = 0.8333333333333334 \][/tex]

Therefore, the slope of the line passing through the given points is [tex]\(\boxed{0.8333333333333334}\)[/tex].