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adell [148]
3 years ago
5

Question 3 of 10

Mathematics
1 answer:
meriva3 years ago
8 0

Answer:

A

Step-by-step explanation:

you can find the vertex of each equation and then compare to the graph

x = -b/2a

A) x = -(-9)/2(1);  x = 9/2 or x = 4 1/2

   plug 4 1/2 into equation as 'x' to find 'y'

    y = (9/2)² - 9(9/2) + 20

    y = 81/4 - 81/2 + 20

    y = 81/4 - 162/4 + 80/4

     y = -81/4 + 80/4

     y = -1/4

the only option with a vertex at (9/2, -1/4) is A

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