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Irina-Kira [14]
3 years ago
13

Line p contains points A(-1,4) and B(3,-5) lines q is parallel to line p. Line r is perpendicular to Line q. What is the slip of

line r
Mathematics
1 answer:
Likurg_2 [28]3 years ago
8 0

Answer:

The slope of line r is \dfrac{ 4}{9}

Step-by-step explanation:

Given as :

The points that line p contains is A ( - 1 , 4 )  and  B ( 3 , - 5 )

Let The slope of line p = m_1

So,  m_1 = \dfrac{y_2-y_1}{x_2-x_1}

Or , m_1 = \dfrac{ - 5 - 4}{3 - (- 1)}

Or, m_1 = \dfrac{ - 9}{4}

<u />

<u>Now, Again ,</u>

Line q is parallel to the line p

let The slope of line q  =  m_2

So, for parallel lines

slope of lines are equal

I.e  m_2 = m_1

∴  m_2 = \dfrac{ - 9}{4}

<u>Again , </u>

Line r is perpendicular to the line q

let The slope of line r  =  m_3

So, for perpendicular lines

The product of the slopes of two line = - 1

m_3 × m_2 = - 1

or, m_3 ×  \dfrac{ - 9}{4}  = - 1

or,  m_3  = \frac{-1}{\frac{-9}{4}}

∴  m_3 =  \dfrac{ 4}{9}

So, The slope of line r =  m_3 =  \dfrac{ 4}{9}

Hence , The slope of line r is \dfrac{ 4}{9}  . Answer

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