The coordinates of point E are (−9, −5) and the coordinates of point F are (−2, −1) .
What is the slope of the line that is perpendicular to EF¯¯¯¯¯?
Enter your answer as a simplified fraction in the box.
slope of EF = difference in y values / difference in x values
slope of EF = [ -1 - -5 ] / [ -2 - -9 ]
slope of EF = 4 / 7
slope of a line perpendicular to EF = - 7 / 4