Help solve my piecewise function problem?

Question

A certain country taxes the first $19,000 of an individual's income at a rate of 15%, and all income over $19,000 is taxed at 25%. Find a piecewise-defined function T that specifies the total tax on an income of x dollars. (Simplify your answer completely.)

Answer 1

T = {    0.15x         for      0 ≤ x ≤ 19000

            0.25x         for        x > 19000           }