Answer:
The point slope form is:
Explanation:
Recall the general point-slope form of a line of slope "m" and going through a point
, is given by:
Notice therefore, that the given line is expressed in "point-slope" form
where the slope is given by the value: "3".
Recall that the slope of a line perpendicular to another given line of known slope "m" is the "opposite of the reciprocal" of that "m". That is:
Then for our case, the line perpendicular to the one given, must have slope given by:
So now we can create easily the point-slope form of the requested perpendicular line that goes through the point (-2,7) using the general point-slope form mentioned above: