Write an expression for the amount of sales tax charged in dollars on a item that cost c dollars

  y= -3x is the required function.

step-by-step explanation:

we have been given a table:

x             y

0             0

1             -3

3             -9

-2             6

we can see that the values of y is -3 times the value of x

hence, the function would be: y= -3x.

put the values of x will give the same y as in the table that means function is satisfying the given table.

a 90 degree rotation across the the origin followed by a reflection across the x-axis.

step-by-step explanation:

sorry not knowing about that

5.7622

step-by-step explanation:

the ten thousandths place is the 2. you round it up if, that number in whatever place is 5 or higher.