Question 1063159
Line passes through (3,-3) and perpendicular to y=1/2x+4
------
The slope of y = (1/2)x + 4 is 1/2
------
The slope of lines perpendicular is the negative reciprocal --> m = -2
-----
y-y1 = m*(x-x1) where (x1,y1) is the point.
========================
PS  Use parentheses.
{{{y=1/(2x) + 4}}} is a different problem.