The equation of a linear relation is: y=-3x+8 which ordered pairs are not relation: A (3, -1) B (7, -13) C ( 8, -16) D (9, -20)

You just need to put coordinate of x and y in equation: 1) [latex]-1=-3*3+8[/latex] [latex]-1=-1[/latex] 2) [latex]-13=-3*7+8[/latex] [latex]-13=-13[/latex] 3) [latex]-16=-3*8+8[/latex] [latex]-16=-16[/latex] 4) [latex]-20=-3*9+8[/latex] [latex]-20 \neq -19[/latex] The last pair isn't the relation of equation.