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Final Verification, Units, and Productive Guessing
Grade Level
ACT Prep
ACTM.010 Final Verification, Units, and Productive Guessing
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For y = |x − 4| + 2, a student identifies the vertex as (4, 2). Which final verification best confirms the transformation?
A
Check that x − 4 shifts the absolute value graph right 4 units and +2 shifts it up 2 units.
B
Use vertex (−4, 2) because the expression x − 4 always shifts left.
C
Use vertex (4, −2) because vertical shifts reverse signs.
D
Set y = 0 and solve for x because every vertex lies on the x-axis.
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