Among the following functions, the first-order function is (1) y = - 8x (2) y = 5x & # 178; + 6 (3) y = - 8 / X (4) y = - 0.5x-1 (5) y = K & # 178; X + 6 (k is a constant)

Among the following functions, the first-order function is (1) y = - 8x (2) y = 5x & # 178; + 6 (3) y = - 8 / X (4) y = - 0.5x-1 (5) y = K & # 178; X + 6 (k is a constant)

First order function: (1) (4)