The graph of ax + by = c is a straight line going through the points (0, c/b) and (c/a, 0).
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It is the graph of a quadratic equation of the formy = ax^2 + bx + c
[ Ax + By = C ] If 'A', 'B', and 'C' are numbers, then the graph is always a straight line, and the equation is a "linear" one.
It is a straight line with gradient -A/B and intercept C/B.
Ax + By = C By = -Ax + C y = (-A/B)x + C/B
Yes Ax + By = C As the line passes through the origin then x = 0 when y = 0. Substituting gives, 0 + 0 = C therefore C = 0.