10.8k views
3 votes
Find the equation of a line perpendicular to y+2=1/2x that passes through the point (2,-7)

User Chenfei
by
7.1k points

1 Answer

4 votes

Answer: y = -2x - 3

Explanation:

Convert the equation into slope-intercept form.

y + 2= 1/2x Minus 2

y = 1/2x - 2

The slope of the line perpendicular to this one will have a slope equal to the negative reciprocal.

The new slope of the perpendicular line is -2

Plug the new slope and the given point into the slope-intercept form to find the y-intercept.

-7 = -2(2) + b

-7 = -4 + b

b = -3

So the equation of the perpendicular line is y = -2x - 3

User Phabtar
by
7.2k points