The slope-intercept form:
m - slope
b - y-intercept
Convert the equation of the line 4x - 7y = 7x + 4y to the slope-intercept form:
<em>subtract 4x from both sides</em>
<em>subtract 4y from both sides</em>
<em>divide both sides by (-11)</em>
Let and then
We have therefore the slope of the line perpendicular is
Therefore we have:
Put the coordinates of the point (4, -4) to the equation of a line:
<em>subtract from both sides</em>
Answer: