A contractor bought ft of sheet metal. has used ft so far and has $ worth of sheet metal remaining. The equation xx represents how much sheet metal is remaining and the cost of the remaining amount. How much does sheet metal cost per square foot? Sheet metal costs $
nothing per square foot.

  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.

9 x 8 divided by (5-3)=36