A calculator to find the equation of a line that is parallel to another line and passing through a point.
How to use the calculator
1  Enter the parameters a, b and c, where a, b and c are the coefficients of the the given line defined as follows.
a*x + b*y = c
2  Then enter the point (xcoord , ycoord) through which the line passes.
3  press "enter". The answer is an equation, in slope intercept form, of the line parallel to the line entered and passing through the point (xcoord , ycoord) .
Note that
1  if you enter a = 0 and b = 0, no answer is given by the calculator.
2  if you enter a not equal 0 and b = 0, the equation of the line is of the form x = constant = xcoord.
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