Question

Guided Practice

Write an equation for the line that is perpendicular to the given line and that passes through the given point.


y = 2x + 7; (0, 0)


A.
y=−1/2x


B.
y=1/2x


C.
y=x−1/2

Answer 1

A.

y=−1/2x

Explanation:

Find the negative reciprocal of the slope of the original line and use the point-slope formula y − y 1 = m ( x − x 1 ) to find the line perpendicular to y = 2 x + 7 .

y = − 1 /2 x