Answer:
y - 1 = -2(x - 1)
Step-by-step explanation:
We want a new line which is perpendicular to y = (1/2)x + 4. This new line will have a slope which is the negative reciprocal of 1/2, the slope of the given line. Thus, the slope of the perpendicular is -2.
Then, in point-slope form, the equation of the new line is:
y - 1 = -2(x - 1).
