Eliminate the parameter. x = t^2 + 1, y = t^2 - 1

Answer Choices:
y = x + 2, x ≥ 1
y = x - 2, x ≥ 1
y = x^2 - 2, x ≥ 1
y = x^2 + 2, x ≥ 1

Mr. roseanne will buy 12 1/2 pounds beef for for a cookout. the price for the first 3 pounds of beef is $4.99 per pound. after that, the price is $4.49 per pound. how much will mr.roshan pay for the beef