A vector a a a starts at P 1 P_1 P 1 and ends at P 2 P_2 P 2 . Express the vector a a a in terms of i i i and j j j . P 1 = ( − 31 , 44 ) P_1=(-31,44) P 1 = ( − 31 , 44 ) , P 2 = ( 35 , − 28 ) P_2=(35,-28) P 2 = ( 35 , − 28 )

66 i − 72 j 66i - 72j 66 i − 72 j

72 i + 66 j 72i+66j 72 i + 66 j

72 i − 66 j 72i-66j 72 i − 66 j