The function Upper T left parenthesis x right parenthesis equals 0.15 left parenthesis x minus 3000 right parenthesis plus 300 represents the tax bill T of a single person whose adjusted gross income is x dollars for income between $ 3000 and $ 49 comma 400, inclusive. (a) What is the domain of this linear function? (b) What is a single filer's tax bill if the adjusted gross income is $ 14 comma 000? (c) Which variable is independent and which is dependent? (d) Graph the linear function over the domain specified in part (a). (e) What is a single filer's adjusted gross income if the tax bill is $ 3060