Which function has the narrowest graph 1. f(x) = 1/3 x^2
2. g(x) = -2x^2
3. h(x) = x^2
4. j(x) = 1/5x^2

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.