3x + 7 if x -1 2 if x = - 1 Select all statements below that you agree with. Note: You may be checking more than one box. No partial credit. Of( - 1) is defined. O lim f(x) exists. x- -1 lim f (ac) = f( - 1). O The function is continuous at x = -1. The function is not continuous at x = -1