The scatter plot shows the relationship between the number of hours spent practicing piano per week and the number of pieces of music the student can play:   part a:   what is the group of points labeled t called? what is the point labeled r called? give a possible reason for the presence of point r.   part b:   describe the association between the number of hours practiced each week and the number of pieces a piano student can play. will give brainyist to person who awnsers both parts