SOLUTION: Write the equation of the line that satisfies the given conditions. Express the final equation in standard form. Contains the point (-6,4) and is parallel to the line x-3y=6

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Question 1134499: Write the equation of the line that satisfies the given conditions. Express the final equation in standard form. Contains the point (-6,4) and is parallel to the line x-3y=6
Found 3 solutions by mathsolverplus, MathLover1, ikleyn:
Answer by mathsolverplus(88)   (Show Source): You can put this solution on YOUR website!
Let's first find the slope of x-3y=6:
-3y=-x+6
y=(1/3)x-2
Slope = 1/3
Parallel means that our line is going to have a slope that is negative reciprocal to (1/3), which becomes -3
y=-3x+b substitute (-6,4) into this equation to find b
4 = 18 +b
b = -14
y=-3x-14
Convert this equation into standard form,
3x+y=-14



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Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

the equation of the line that satisfies the given conditions:
Contains the point (,) and is to the line
first, recall that lines have slope
so, find a slope of the line
.......solve for


=> slope is
since we have point and slope, use point slope formula to find equation

........plug in slope and and coordinates of given point







=> the final equation in standard form




Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
.

            The solution by @mathsolverplus is fatally WRONG.

            The solution by @MathLover1 is fatally WRONG, too.

            I came to provide a correct solution.


Each line parallel to the line x - 3y = 6 has THE SAME left side 


    x - 3y = c,      (1)


where "c" is the constant term.


To determine the constant value of "c", use the condition that the point (-6,4) belongs to the line  (1).


For it, substitute the coordinates x= -6,  y= 4 into equation (1) and calculate "c". You will get


    -6 - 3*4 = c = -6 - 12 = -18.


Thus your final equation is


    x - 3y = -18.       ANSWER

Solved, completed and answered.

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For this and many other similar problems see the lessons
    - Find the slope of a straight line in a coordinate plane passing through two given points
    - Equation for a straight line having a given slope and passing through a given point
    - Solving problems related to the slope of a straight line
    - Equation for a straight line in a coordinate plane passing through two given points
    - Equation for a straight line parallel to a given line and passing through a given point
    - Equation for a straight line perpendicular to a given line and passing through a given point

    - OVERVIEW of lessons related to the slope of a straight line
in this site.

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