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What value of b completes the function f(x)=-x^2+bx+1?
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What value of b completes the function f(x)=-x^2+bx+1?

What value of b completes the function f(x)=-x^2+bx+1?-example-1
User Jobe
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1 Answer

3 votes

Answer:

Explanation:

It is hard to guess the coordinates of any points, because the graph doesn't go through any intersections of the grid.

Fortunately, I can tell that the axis of symmetry is x=2.

Put the equation into vertex form by completing the square.

axis of symmetry = b/2

b/2 = 2

b = 4

What value of b completes the function f(x)=-x^2+bx+1?-example-1
What value of b completes the function f(x)=-x^2+bx+1?-example-2
User Dook
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