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

1 Answer
Prof_S
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}#

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