Find the equation of a line, in slope-intercept form, of a line passing through (−3, 5) and parallel to the line given by y = 2x + 4.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter4: Equations Of Linear Functions
Section4.3: Parallel And Perpendicular Lines
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Find the equation of a line, in slope-intercept form, of a line passing through (−3, 5) and parallel to the line given by y = 2x + 4.

Expert Solution
Step 1

Slope - intercept form:

y = mx + C

where m = slope

and C = y-intercept

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  • Two parallel lines have the same slope.

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Equation of the line having slope m and  passing through (x1,y1):

y-y1 = m(x-x1)

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Step 2

The slope of the required line will be the same as the line y = 2x + 4  i.e 2 because they are parallel.

so m = 2.

It is given that the line passes through (−3, 5). Therefore, the equation of the line will be:

y - 5 = 2(x-(-3))

y-5 = 2(x + 3)

y-5 = 2x + 6

   y = 2x + 6 + 5

   y = 2x + 11

 

 

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