9(x)=ax+b dan 9(-2)=-4 9(-6)=12 maka fungsi 9 adalah

g(x)=ax+b
g(-2)= -2a + b = -4
g(-6)= -6a +  b = 12

-2a - (-6a) + b - b = -4 - 12
                        4a = -16
                          a = -16/4
                          a = -4

-6(-4) + b = 12
    24 + b  = 12
             b  = 12 - 24
                 = -12