Which is the absolute value function corresponding to the graph with these characteristics? •vertex is at (-2, k) •v-shaped graph •opens in the downward direction •coefficient a is (+/-)4 •left arm passes through point (-3, -1) a. y = 4|x − 2| b. y = 4|x − 2| + 3 c. y = -4|x + 2| + 3 d. y = -4|x + 2| − 3

The parent function for an absolute value function is:



If a is positive, the graph will open upward, and if a is negative, it will open downward. Given that the graph opens downward, we know a must be negative.

Next, h represents the horizontal shift of the graph. Given that the vertex is at (-2,k), we know that h = 2.

The k value does not matter because in the given characteristics we are given a general k value that will work with any graph.

Finally, we need to find which graph passes through (-3, -1). To meet the requirements discussed above, we can narrow the answer to C or D. Now just plug in -3 for x in both functions, and whichever one equals -1 at x=-3 is our

C) -4|-3 + 2| + 3 = -4(1) + 3 = -1

D) -4|-3 + 2| - 3 = -4(1) - 3 = -7

The answer is C.

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