Question

considerando a função afim y=ax+3 e f (-1)=6,determine o valor de X para Y=-5

Answer 1

 y = ax + 3
                     f(-1) = 6 = a(- 1) + 3
                                6 = - a + 3
                                a = 3 - 6
                                            a = - 3 
A função é
                     y = - 3x + 3

 Para y = 5
                         5 = - 3x + 3
                         3x = 3 - 5
                         3x = - 2
                                           x = - 2/3