Which of the following equations describes a line that is perpendicular to y = x/2 + 5?	Choose the correct choice:	A) y = x − 5	B) y = −3 − 2x	C) y = 5x	D) y = 5x - 1	E) y = 1/x + 5
Two perpendicular lines have slopes that are inverse reciprocals of each other.   The slope of y = x/2 + 5 is 1/2 so the slope of a perpendicular line will be -2.   The answer is y = −3 − 2x.
<result>B</result>
Which of the following equations describes a line that is perpendicular to y = x/2 + 5?