Decide if each relationship is proportional. If yes, state the unit rate x | 1 | 2 | 4 | 7 | 9 |
y | 5 | 9 | 17 | 29 | 37 |

Will mark 50 show all what is the solution to the system of equations? use the substitution method and show your work. -5x+y= -3 -15 x+3y=7 explain what your answer in part (a) tells you about the association of the lines in this system.