The formula of a slope:

We have the points (-6, -1) and (-6, 4).
Substitute:

Dividing by 0 is not possible, therefore the slope is undefined.
<em>It's a vertical line x = -6</em>.
Answer:

Step-by-step explanation:

The graph shows the profile of your parabolic listening device,
Answer:
D. ∠B≅∠Y, ∠A≅∠X, ∠C≅∠Z
Step-by-step explanation:
Corresponding angles are in the same order in both triangle names. That is, the corresponding angles are ...
(A, X), (B, Y), (C, Z)
Rigid transformations do not change any angles, so the angles of the image are the same as the corresponding angles of the original.
∠A≅∠X, ∠B≅∠Y, ∠C≅∠Z . . . . . matches selection D