A family had dinner in a restaurant and paid $30 for food items. They had to pay 5% tax. How much did they pay for the dinner after tax?

30/100 X 105 = 31.50

they pay $31.50

  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.