Write the equation of a line that is perpendicular to 2x-7y=13 and which passes through the point ( -3,8).

Given parameters:

Equation of the line given  2x - 7y = 13

Coordinates of points = -3, 8

Unknown:

Equation of a line perpendicular = ?

Solution;

 To find the equation of this line, simply find the negative inverse of the given line.

         m  =

          2x - 7y = 13 , this is an equation of a straight line

  let us write it in the form y = mx + c so as to derive the slope

        y and x are coordinates

         m is the slope

        c is the y intercept

  2x - 7y = 13;

        -7y = -2x + 13

  divide through by -7;

             y = +

The slope of this line is ;

           Now the slope of a line perpendicular to it will be ;

  the equation of the line will be;

        y  =

Since the coordinate of this line is (-3,8) , let us find C;

     y  = 8 and x = -3;

     8  = (-3) + C

         multiply through by 2;

    16 = 21 + 2C

    16 - 21  = 2C

      -5 = 2C

        C  =

Now the equation of the line is;

              y  =

i would say c is the best answer, hope it's right!

good luck! =)

cutie~

answer: 230 miles ( vote ! )

step-by-step explanation:

180.39 minus 17.99 equals 162.4

then divide 162.4 by .80 to get 230