Emeriek
contestada

Write an equation in slope-intercept form
of the line that passes through the point
(-12,6) and is perpendicular to the line
X= - 3/4y -5 ( What would be my first step to put that equation into slope intercept form?) 

Respuesta :

Hint :-

  • The product of slopes of two perpendicular lines is -1 .
  • The slope intercept form of the line is [tex] y = mx + c [/tex] .
  • The point slope form of the line is [tex] m(x-x_1) = (y-y_1) [/tex]

Solution :-

The given equation to us is ,

[tex]\implies x = \dfrac{-3}{4}y - 5 [/tex]

Convert it to slope intercept form we have ,

[tex]\implies 4x =-3y -20 \\\\\implies 3y = -4x -20 \\\\\implies y =\dfrac{-4}{3}x -\dfrac{20}{3}[/tex]

On comparing to the slope intercept form of the line we have ,

  • [tex]m = \dfrac{-4}{3}[/tex]

As we know that the product of slopes of two perpendicular lines is-1 , henceforth ,

  • [tex] m_{perp}= \dfrac{3}{4}[/tex]

Now using slope point form rewrite the equation of the perpendicular line ,

[tex]\implies y-y_1 = m(x-x_1) \\\\\implies y -6 = \dfrac{3}{4}(x+12)\\\\\implies 4y -24 = 3x + 36 \\\\\implies 3x -4y +36+24=0\\\\\implies \underline{\boxed{ \gray{3x -4y +60=0}}}[/tex]