Question

Read the question and help me with that, please.​

Answer 1

B=-1

Explanation:

diagonals are perpendicular line, the slope of perpendicular line are opposite reciprocal.

example if the slope line AC =3

the slope of BD=-1/3

-1/3*3=-1

Answer 2

B. -1

Explanation:

examples:

1 and -1

1/2 and -2