Use numerical evidence to determine whether the limit of f (x ) exists at x = 7. f (ac ) = x2-6x-7 x2 -7x Round your answer to two decimal places. If the limit does not exist, enter DNE. lim f (x ) = Select the option that best describes the behavior of the graph of f (x ) near x = 7. O The limit exists. The graph approaches the same value from the left and right of x = 7