What is the slope of the line that passes through (3, -7) and (-1, 1)?

Mathematics

1 answer:

Andru [333]3 years ago

6 0

(3, -7) and (-1, 1)

To find slope of a line using 2 points

we use formula

$\frac{y_2 - y_2}{x_2-x_1}$

(3, -7) is (x1,y1) and (-1, 1) is (x2,y2)

Here x1= 3 and y1= -7

x2=-1 and y2=1

$\frac{1- (-7)}{-1-3}$

$\frac{8}{-4}$ =-2

slope of a line using 2 points (3, -7) and (-1, 1) is -2

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Answer:

16) No

17) (c)

Step-by-step explanation:

For a lot of multiple-choice matrix problems, a simple test is all that is needed to determine the correct answer.

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A^-1 = [[-.2, .3][-.2, -.2]]

17) The matrices are both 3×3, so their product is possible (eliminates choice D). The upper left term is different among the answer choices, so we can determine the correct one by computing that term only.

BA=C

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This matches the third choice (C).

If you use a calculator to compute the full matrix product, it matches choice C in all details.

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