SOLUTION: I want to teach the function rule for my daughter's assignment. How do you solve this problem with a formula? The problem states: Find the rule for each function table; and the x s

Question 693570: I want to teach the function rule for my daughter's assignment. How do you solve this problem with a formula? The problem states: Find the rule for each function table; and the x should be the same number for each of the problem.
x
-2 12
1 9
4 6
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
x
-2 12
1 9
4 6
==============
The x's increase by 3
The f(x) values decrease by 3
----------
--> f(x) = -x + k
Use any point to find k
9 = -1 + k
k = 10
===============
f(x) = -x + 10

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