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Anettt [7]
3 years ago
6

Find the vertex of the graph and the axis of symmetry

Mathematics
1 answer:
ale4655 [162]3 years ago
6 0
How to do the vertex is using the formula -b/2a

your a=-9 and b is -18 but it going to become +18 because you are multiplying the -(-18) which there a 1 in front the neg. you going to multiply the -9 by 2 and do 18/18 so your x= -1. You got your x, you going to put in the equation as y=-9(-1)^2-18(-1)-1 then you got your y... hope this is helpful :)
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Lets write down the information that we know.

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