Answer
$y−y_1=m(x−x_1) $
Work Step by Step
RECALL:
The point-slope form of a line's equation is:
$y−y_1=m(x−x_1) $
where
m= slope and $(x_1,y_1)$ is a point on the line.
Thus, the missing expression in the given statement is: $y−y_1=m(x−x_1) $
