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Need help quick,PLEASE HELP!

Need help quick,PLEASE HELP!-example-1

1 Answer

3 votes

Answer:

see explanation

Explanation:

The vertex of f(x) = x² is at (0, 0)

To find the vertex of g(x) = x² - 8x + 7 ← in standard form

The x- coordinate of the vertex is


x_(vertex) = -
(b)/(2a)

where a = 1 and b = - 8


x_(vertex) = -
(-8)/(2) = 4

substitute x = 4 into the equation for corresponding y- coordinate

y = 4² - 8(4) + 7 = 16 - 32 + 7 = - 9

The vertex of g(x) is at (4, - 9)

thus (0, 0) → (4, - 9) is 4 units right and 9 units down → option C

User Peter Mularien
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