9. The cost function in a computer manufacturing plant is C(x) = 0.28x2 - 0.7x + 1, where C(x) is the cost per hour in millions of
dollars and x is the number of items produced per hour in thousands.
Determine the minimum production cost.

i will pick c put check it over to be sure

step-by-step explanation:

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:

1 and 0

step-by-step explanation:

the ordered pairs for the given function are of the form