Question

Find the slope of the line that contains the points named.

Answer 1

Answer:

        B.   - 1

Step-by-step explanation:

The slope of the line passing through two given points:  $m=\dfrac{y_2-y_1}{x_2-x_1}$

K(c + d, c-d)   ⇒     x₁ = c + d,     y₁ = c - d

L(c-d, c+ d)   ⇒      x₂ = c - d,     y₂ = c + d

So, the slope:

                     $m=\dfrac{c+d-(c-d)}{c-d-(c+d)}=\dfrac{c+d-c+d}{c-d-c-d}=\dfrac{2d}{-2d}=-1$