For the following plane curve, find a rectangular equation. xequalst, yequalsStartRoot t squared plus 7 EndRoot for t in (minusinfinity,infinity) Question content area bottom Part 1 What is the rectangular equation for the given parametric equation? yequals StartRoot left parenthesis x squared plus 7 right parenthesis EndRoot (Type an expression using x as the variable.) Part 2 Which of the following is the domain of x? A. (0,infinity) B. [0,infinity) C. (minusinfinity,0) D.