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23 February, 15:21

What is the vertex of the absolute value function defined by ƒ (x) = |x + 5| + 7?

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  1. 23 February, 17:58
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    To answer this, you need to know the general form of an absolute value function. the equation for this is f (x) = a|x - h | + k, and in this equation, the vertex is (h, k).

    with that information, you can see that your vertex will be (-5, 7). you must take the negative for 5 because the general equation states that your h value is usually subtracted from x. to check your vertex, try plugging it into your general equation:

    f (x) = a|x - (-5) | + 7

    f (x) = a|x + 5| + 7 ... you see that this matches your given equation. this last part here was just to show why your 5 must be negative; your answer is bolded.
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