The area of a rectangle is 80 ft2. If the rectangle is 8 feet long, what is its width?

8

step-by-step explanation:

this is a subtraction problem.

10 - 2 = 8

  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.