Question

A function is defined by y = 2x + 1. What is the range of the function if the domain is {0, 2, 3}?

{0, 4, 6}
{0, 4, 6}

{1, 5, 7}
{1, 5, 7}

{0, 2, 3}
{0, 2, 3}

{2, 4, 5}
{2, 4, 5}

Answer 1

9514 1404 393

Answer:

{1, 5, 7}

Explanation:

For x=0, y = 2·0 +1 = 1

For x=2, y = 2·2 +1 = 5

For x=3, y = 2·3 +1 = 7

The range is the list of y-values, so is {1, 5, 7}.