Which of the following lines is perpendicular to y = − 2x + 3 and has the same y-intercept as y = 2x − 3? Choose one.
A) y = -1/2*x + 3  B) y = 1/2*x - 3  C) y = 1/2*x + 3  D) y = 2x + 3  E) y = 2x − 3
Slope of y = − 2x + 3 is -2.   Product of slope of Perpendicular lines is always -1. Therefor slope of a line perpendicular to the above line is 1/2   1/2*-2 = -1   General equation of a line perpendicular to y = − 2x + 3 is y = 1/2x + k where is the k is the y intercept.   y-intercept of y = 2x − 3 is -3   Therefore equation of the required line is   y = 1/2 x - 3   Answer y = 1/2*x - 3
<result>B</result>
Which of the following lines is perpendicular to y = − 2x + 3 and has the same y-intercept as y = 2x − 3?