Aprilcamilleclaresego Aprilcamilleclaresego Math Answered put a / mark if the following show direct proportion and x if it is not1. 6: 4 = 5 : 32. 15: 20 = 3: 43. 25: 12 = 8: 64. 40: 72 = 5: 95. 20: 8 = 5: 2