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What is the y-intercept, axis of symmetry and vertex of the following function.


F(x)=-3x^(2) -6x-5

I will give brainilst help please

User ChrisBorg
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7.9k points

2 Answers

5 votes
Y intercept = 5
Axis of sym = -1
Vertex = (-1, -2)
User Mossab
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8.1k points
3 votes
To find the y intercept you must substitute 0 into x.

F(x) = (-3x0) - (6x0) - 5
F(x) = -5

To find the axis of symmetry and vertex we use the formula -b/2a to find the x coordinate

x = 6/(-3x2)
x = 6/-6
x = -1

Now we need to find the y coordinate so we sub -1 into x.

F(x) = (-3x-1) - (6x-1) - 5
F(x) = 3 + 6 - 5
F(x) = 4

The axis of symmetry and vertex are (-1,4) and the y coordinate is -5. Hope this helps.
User Sitam Jana
by
7.4k points
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