Question

What is the domain of the function shown in the mapping?

{x | x = –5, –3, 1, 2, 6}
{y | y = –9, –6, 0, 2, 4}
{x | x = –9, –6, –5, –3, 0, 1, 2, 4, 6}
{y | y = –9, –6, –5, –3, 0, 1, 2, 4, 6}

Answer 1

Answer: Choice A) The value of x can be -5, -3, 1, 2, 6

List everything in the "input" oval which consists of the values: -3, 2, -5, 1, 6

This list sorts out to -5, -3, 1, 2, 6

We use x in the domain because the domain is the set of allowed inputs or x values of a function.