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rosijanka [135]
2 years ago
6

What is an equation of the line that passes through the points (-4, -5) and (-8, -2)?

Mathematics
2 answers:
nikklg [1K]2 years ago
7 0

Solution:

<u>Step-1: Find the slope of the line.</u>

Formula of slope: y₂ - y₁/x₂ - x₁

  • y₂ - y₁/x₂ - x₁ = Slope
  • => -2 - (-5)/-8 - (-4) = Slope
  • => -2 + 5/-8 + 4 = Slope
  • => 3/-4 = Slope

<u>Step-2: Use the point slope formula to determine the slope.</u>

Point slope form formula: y - y₁ = m(x - x₁)

  • y - y₁ = m(x - x₁) = Equation of line
  • => y - (-5) = -3/4{x - (-4)} = Equation of line
  • => y + 5 = -3/4{x + 4} = Equation of line
  • => y + 5 = -3x/4 - 3 = Equation of line
  • => y = -3x/4 - 8 = Equation of line

The equation of the line is <u>y = -3x/4 - 8.</u>

Nesterboy [21]2 years ago
4 0

To find the equation, First step is to find the slope which we can use in the formula and then we will find the equation using the specific formula...

<h3>Finding slope ⤵️</h3>

\boxed{ \sf \:m =  \frac{ y_{2} - y_{1}  }{ x_{2} -  x_{1}}  }

  • (x1,y1) = (-4,-5)
  • (x2,y2) = (-8,-2)

\tt \to \: m =  \frac{ - 2-( - 5)}{ - 8 -(- 4)}

\tt \to \: m =  \frac{ -2+5}{ -8+4}

\tt \to \: m =  -  \frac{3}{4}

<h3>Now, Put the values in the formula used to find the equation ⤵️</h3>

\boxed{ \sf \:y -  y_{1} = m(x - x_{1}) }

  • (x1,y1) = (-4,-5)

\tt \nrightarrow \: y - ( - 5) =  -  \frac{3}{4} (x - ( - 4))

\tt \nrightarrow \: y  +  5 =  -  \frac{3}{4} (x  +  4)

\tt \nrightarrow \: y  +  5 =  -  \frac{3}{4} x   - 3

\tt \nrightarrow \: y   =  -  \frac{3}{4} x   - 3 - 5

\bf\nrightarrow \: y   =  -  \frac{3}{4} x   - 8

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