What number decreased by 3.5 equals 12.7 i have to write an equation then solve the problem

n - 3.5 = 12.7

n=16.2

Step-by-step explanation:

n - 3.5 = 12.7, to solve add 3.5 to both sides

n = 12.7 + 3.5

n=16.2

  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.