What is the range of f(x) = 2x - 2 for the domain {-1, 1, 4, 7}?

1 Answer
Jan 12, 2016

{-4,0,6,12}

Explanation:

When x = -1, f(x) = 2x-2 = 2(-1)-2 = -4.
When x =1, f(x) = 2x-2 = 2(1)-2 = 0.
When x =4, f(x) = 2x-2 = 2(4)-2 = 6.
When x =7, f(x) = 2x-2 = 2(7)-2 = 12.
So the values achieved, which is the range is {-4,0,6,12}