If Tommy ate 5 cupcakes and gave 5 way out of 20 how many are left?
5+5=10-20=10

10

Step-by-step explanation:

5+5= 10 (10 cupcakes taken away)

Original amount: 20 cupcakes

20-10=10

  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.