From $16 to $4
Percent decrease

75%

Step-by-step explanation:

75%

Step-by-step explanation:

The difference is $12 so let's calculate the percent of 12 to 16:

12/16 = 0.75 = 75%

  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.