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

Question 837574: Please help me solve this linear equation!
AMP Parsing Error of [f(0=3, f(4)=9]: Invalid function: opening bracket expected at /home/ichudov/project_locations/algebra.com/templates/Algebra/Expression.pm line 88. .
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
What you are trying to show as given is this:
and

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, .

Pick either point.
, which is also OBVIOUS from f(0).
EQUATION:
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