Question

Find the domain of f(x) = -4x + 2 for the range {-5, 2, 6, 18).

Answer 1

Explanation:

calculate x for this equation

f(x) = -5 : -4x +2 = - 5 so : -4x =-7 x = 7/4

f(x) = 2 : -4x +2 = 2 so : -4x =0 x = 0

f(x) =6 : -4x +2 = 6 so : -4x =4 x = -1

f(x) = 18 : -4x +2 = 18 so : -4x =16 x = - 4

the domain is : D = {7/4, 0, -1, -4}