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# Function domain word problems

## Problem

Mason stands on the 5, start superscript, start text, t, h, end text, end superscript step of a vertical ladder. The ladder has 15 steps, and the height difference between consecutive steps is 0, point, 5, start text, space, m, end text.
h, left parenthesis, n, right parenthesis models the height above the ground of Mason's feet (in start text, m, end text) after moving n steps (if Mason went down the ladder, n is negative.)
Which number type is more appropriate for the domain of h?