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Chapter 3: Q 212. (page 293)

In the following exercises, find an equation of a line perpendicular to the given line and contains the given point. Write the equation in slope-intercept form.

Line:x=-5Point:(1,-2)

Short Answer

Expert verified

The equation in slope-intercept form:

y=-x-1

Step by step solution

01

Step 1. Given Data

Line:x=-5Point:(1,-2)

02

Step 2. Find the slope of the given line.

The line is in slope-intercept form:

x=-5x+5=0or0y=x+5y=mx+cWecansee,m=1

03

Step 3. Find the slope of the perpendicular line.

The slopes of Perpendicular lines are negative reciprocals.

Therefore,

m鈯�=-11=-1m鈯�=-1

04

Step 4. Point slope form. 

The given point is:(1,-2)

Substitute the values in the point-slope form which is:

y-y1=m(x-x1)y-(-2)=-1(x-1)y+2=-x+1

05

Step 5. Write the equation in slope-intercept form.

Slope-interceptform:y+2=-x+1y=-x+1-2y=-x-1

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