1 00:00:00,501 --> 00:00:03,108 The function f(x) is graphed. 2 00:00:03,108 --> 00:00:05,395 Find f(-1). 3 00:00:05,395 --> 00:00:07,502 So this graph right over here is essentially 4 00:00:07,502 --> 00:00:09,236 a definition of our function. 5 00:00:09,236 --> 00:00:12,281 It tells us, “Given the allowed inputs into our function, 6 00:00:12,281 --> 00:00:14,375 what would the function output?” 7 00:00:14,375 --> 00:00:15,502 So here, they're saying, 8 00:00:15,502 --> 00:00:21,500 “Look, what gets output when we input x = -1?” 9 00:00:21,500 --> 00:00:24,126 So x = -1 is right over here. 10 00:00:24,126 --> 00:00:25,970 x = -1. 11 00:00:25,970 --> 00:00:32,456 And our function graph is right at 6 when f is equal to -1. 12 00:00:32,456 --> 00:00:36,969 So we can say that f(-1) = 6. 13 00:00:36,969 --> 00:00:38,078 Let me write that right over here. 14 00:00:38,078 --> 00:00:41,711 f(-1) = 6.