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Worked example: Evaluating functions from graph

Video transcript

the function f of X is graphed find F of negative one so this graph right over here is essentially a definition of our function it tells us given the allowed inputs into our function what would the function output so here they're saying look what does what gets output when we input X is equal to negative one so x equals negative one is right over here X is equal to negative one and our function graph is right at six when F is equal to negative one so we can say that F of negative one is equal to six let me write that over here F of negative one is equal to six