Question

Are these lines perpendicular explain

Answer 1

Yes because the slopes are negative reciprocals of each other.

Explanation:

The slope of line B is: 1/3

(-2, -4) and (1, -3)

(-3+4)/(1+2) = 1/3

The slope of line A is: 3

(-3, 0) and (-2, -3)

(-3-0)/(-2+3) = -3

Answer 2

yes, they cross each other and make an angle of 90° or right angle.