The function y=x^2-4x+5 approximates the height, y, of a bird, and its horizontal distances, x, as it files from one fence post to another. All distances are feet. Complete the square to find and interpret the extreme value (vertex).

12561---£--£7778263777777777377277373

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: