8. Here is a graph of the equation 2x - 3y = 15.
a) Are the points (1.5,- 4) and (4,- 4) solutions to the
equation? Explain or show how you know.
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b) Check if each of these points is a solution to the inequality 2x зу < 15:
(4,-2)
(0,-5)
(2,-4)
(5, 1)