Find the equation whose graph is shown below. Write your answer in standard form.
(Standard form is $Ax+By = C$, where $A$ is positive, and $A$, $B$, and $C$ are integers with greatest common divisor $1$.)
The equation of this line in the form y = mx + b is y = (1/2)x + 2, so we can do:
2y = x + 4
-x + 2y = 4
Answer: -x + 2y = 4
Since A is positive we can just multiply DS2011's answer through by -1
x - 2y = -4
Oh yes I did not see that A had to be positive.
+1911 
