SOLUTION: Please help me solve this linear equation! {{{f(0=3, f(4)=9}}}

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Question 837574: Please help me solve this linear equation!
f%280=3%2C+f%284%29=9
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
What you are trying to show as given is this:
f%280%29=3 and f%284%29=9

The way you wrote, "f(0=3, f(4)=9" is faulty and will fail to render, as it did fail to render.

You have two points: (0,3) and (4,9).
You want the equation for the line defined.
Form, y=mx%2Bb.
m=%289-3%29%2F%284-0%29=3%2F2
b=y-mx
Pick either point.
b=3, which is also OBVIOUS from f(0).
EQUATION: highlight%28y=%283%2F2%29x%2B3%29