Write an equation for the line of the given point and perpendicular to the given line. Please help
(5,-4);2x+9y=4
Since the new line is perpendicular to 2x+9y = 4
the new line must look like
9x - 2y = c, where c is some constant
But (5,-4) lies on this new line, no
45 + 8 = c = 53
new line:
9x - 2y = 53
all done!
change to y = mx + b form if need be.