A shipping company charges $6 to ship a package that weighs up to 1 pound and $2 for each additional pound or portion of a pound. Which equation represents the cost, in dollars, of shipping a package that weighs x pounds?
ORX) - 6+21 x-17, where x > 0
O f(x) - 6+2Lx-1), where x > 0
ORX) - 6+2x+17, where x > 0
O fx) - 6+2Lx+ 1], where x > 0