Calculating a Vertex
What is the vertex of the function?
Consider the quadratic function:
(x) = x² – 8x-9
What is the vertex?

part a

x     y

0     8

1     7.5

2     7

3     6.5

4     6

5     5.5  

for every hour i deducted .5 inches from the length of the candle

part b

it is a function because for every x value there is only one y value

part   c

for every x value there is only one y value

x       y

0       8

1       7.6

2       7.2

3       6.8

step-by-step explanation:

other answer is correct. i had used the radius of the radius somehow. a website:

the answer is  

a.

28 ft2

step-by-step explanation: