If 5x+20=y, what is the value of x+4?

5x=y-20

X=(y-20)/5

Wich is

x=y/5 +4

Now x+4 =y/5 +4+4

Then x+4= y/5 +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.