Question

The line of symmetry for the quadratic equation y = ax^2 + 8x - 3 is x = 4. What is the value of "a"?


A.) -2

B.) -1

C.) 1

Answer 1

Axis of symmetry

x = -b/(2a)

4 = -8/(2a)

4*2a = -8

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a = ???

Answer 2

-1

Answer 3

correct

Answer 4

Thank ya sir

Answer 5

you're welcome