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Write an equation of the line that passes through the given point and is perpendicular to the given line. Your answer should be written in slope-intercept form.P(0, 0), x = −6y − 18

Write an equation of the line that passes through the given point and is perpendicular-example-1
User Ian Clelland
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1 Answer

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Step-by-step explanation:

Given;

We are given the following linear equation;


x=-6y-18

Required;

We are required to write the equation of a line perpendicular to the one given and which passes through the point


P(0,0)

Step-by-step solution;

We shall begin by expressing the equation given in slope-intercept form as follows;


\begin{gathered} Slope-intercept\text{ }form: \\ y=mx+b \end{gathered}

We shall now make y the subject of the given equation. This is shown below;


\begin{gathered} x=-6y-18 \\ Add\text{ }6y\text{ }to\text{ }both\text{ }sides: \\ x+6y=-6y+6y-18 \\ Subtract\text{ }x\text{ }from\text{ }both\text{ }sides: \\ x-x+6y=-6y+6y-x-18 \end{gathered}

We can now simplify;


6y=-x-18

Next we divide both sides by 6;


(6y)/(6)=-(x)/(6)-(18)/(6)
y=-(1)/(6)x-3

We now have the equation in the 'slope-intercept' form.

Take note that the coefficient of x is the slope of the line. Also, note that for a line perpendicular to another one, the slope of one would be a negative inverse of the other.

Therefore, we have the slope of this line as


m=-(1)/(6)

The inverse of that would be


inverse=-(6)/(1)

and the negative of that would be


Negative\text{ }inverse=(6)/(1)=6

Therefore, we need to find the equation whose slope is 6, and passes through the point (0, 0).

Using the general form of the equation;


y=mx+b

Where we have;


\begin{gathered} (x,y)=(0,0) \\ m=6 \end{gathered}

We can have the following;


\begin{gathered} y=mx+b \\ \Rightarrow0=6(0)+b \end{gathered}

Simplify this and we'll have;


0=b

Now we have the values of m and b.

The equation after substituting for the values of m and b would now be;

ANSWER:


\begin{gathered} y=6x+0 \\ Therefore: \\ y=6x \end{gathered}

User Snopzer
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