SOLUTION: The relationships in the tables below are functions. Write a function rule for each table. x y 1 20 2 16 3 12 4 8

Algebra ->  Functions -> SOLUTION: The relationships in the tables below are functions. Write a function rule for each table. x y 1 20 2 16 3 12 4 8      Log On


   

Question 344623: The relationships in the tables below are functions. Write a function rule for each table.
x y
1 20
2 16
3 12
4 8
Answer by Jk22(389) About Me  (Show Source):
You can put this solution on YOUR website!
x y
1 20
2 16
3 12
4 8

at each step +1 for x, we notice a step -4 for y, hence we could write :

y(x)=20-4*(x-1)

for x=1, we have y=20-0=20
x=2 : y=20-4=16
x=3 : y=20-8=12
x=4 : y=20-4*3=20-12=8