SOLUTION: Cant find the function rule for 0 20 2 18 4 16 8 12 Im the mom n cant help my daughter. Thanks!

Algebra ->  Functions -> SOLUTION: Cant find the function rule for 0 20 2 18 4 16 8 12 Im the mom n cant help my daughter. Thanks!       Log On


   

Question 726210: Cant find the function rule for
0 20
2 18
4 16
8 12
Im the mom n cant help my daughter. Thanks!

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
As x increases by 2, y decreases by 2. So the slope is -2/2 = -1. So m = -1

The y intercept is 20 since this is where x = 0. So b = 20

This means y = mx+b turns into y = -1x + 20 which is just f(x) = -x+20 which is your final answer (in function notation).