How to find if two lines are perpendicular?

Determine whether the points (–3,–6) and (2,–8) are in the solution set of the system of inequalities below. x ? –3 y < 5? 3x + 2 a. the point (–3,–6) is not in the solution set, and the point (2,–8) is in the solution set. b. neither of the points is in the solution set. c. the point (–3,–6) is in the solution set, and the point (2,–8) is not in the solution set. d. both points are in the solution set.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

What value is a discontinuity of x squared plus 8 x plus 4, all over x squared minus x minus 6?