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-2/3 (-6) + 5 = 9
4 + 5 = 9
9 = 9
titk q
-2/3 (-3) + 5 = 7
2 + 5 = 7
7 = 7
titik r
-2/3 (3) + 5 = 3
-2 + 5 = 3
3 = 3
Maka p, q r semuanya terletak pada garis y = -2/3 x + 5