Linear combination method just means to add the equations so that one variable with cancel. In this case the a values are already set up so that they will cancel. 2a + 3b = 1 -2a + b = 11 4b = 12 b = 3
now put 3 back into either of the original equations and solve for a. 2a + 3(3) = 1 2a + 9 = 1 2a = -8 a = -4 (-4,3)
= to because the graph has a y int at 1 and so does your formula given (just make x=0 to find it by plugging that in) and that one has a y int at 1 too
