SOLUTION: In my math book the directions say ; Write an equation for a linear function f that has the given values. Example number 24 ; f(-2)=-2, f(4)=-8 I dont understand how to do this, c

Question 686822: In my math book the directions say ; Write an equation for a linear function f that has the given values. Example number 24 ; f(-2)=-2, f(4)=-8
I dont understand how to do this, could you explain it step by step & why? Thank you.
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Given:

------------
A linear equation will have the form

(1)
-------------------

(2)
-----------------
Now I have 2 equations with
2 unknowns, so it's solvable
(1)
(1)
and
(2)
(2)
-------------------
Subtract (1) from (2)
(2)
(1)

and
(1)
(1)
(1)
(1)
The function is:

---------------
check answer:

OK

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