Inequalities and Graphs?

Question

The points (0,0), (1,5) and (3,6) belong to the region with the (a) inequation:

(b) y - 2x > 3

(c) 2y smaller than or equal to 5

(d) 3y + x is smaller than or equal to 21

(e) 2y - x is bigger than or equal to 6

Please Help.

Answer 1

Substituting the x- and y- values into the inequalities easily leads to the correct answer. There is only one inequality that is true for all three points, and one is false for all three points.