For the polynomial 6xy2−5x2y?+9x2 to be a trinomial with a degree of 3 after it has been fully simplified, what is the missing exponent of the y in the second term?

The following table shows the number of hours some students of a class listen to music each day: student a b c d e f g h i j k l m n o hours 6.5 1 2.5 2.5 4 1 0.5 4.5 5 1 1 2 1.5 1.5 2 which histogram best represents the data? histogram plots number of hours spent listening to music daily on x axis and number of students on y axis. height of the bar in the x interval 0 to 2 is 11, height of the bar in the x interval 2 to 4 is 3 and the height of the bar in the x interval 4 to 6 is 1. histogram plots number of hours spent listening to music daily on x axis and number of students on y axis. height of the bar in the x interval 0 to 3 is 10, height of the bar in the x interval 3 to 6 is 2 and the height of the bar in the x interval 6 to 9 is 1. histogram plots number of hours spent listening to music daily on x axis and number of students on y axis. height of the bar in the x interval 0 to 3 is 11, height of the bar in the x interval 3 to 6 is 3 and the height of the bar in the x interval 6 to 9 is 1. histogram plots number of hours spent listening to music daily on x axis and number of students on y axis. height of the bar in the x interval 0 to 2 is 10, height of the bar in the x interval 2 to 4 is 2 and the height of the bar in the x interval 4 to 6 is 1.