SOLUTION: Give the equation of the linear function, f(x) if f(1) = 4 and f(3) = 8

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Question 159464: Give the equation of the linear function, f(x) if f(1) = 4 and f(3) = 8
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
A linear equation has the form,

Let's use the values you provide and solve for m and b.
First value,


1.
Second value,


2.
Subtract eq. 1 from eq. 2,



From eq. 1,
1.


The linear equation is,

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