which equation describes a line that contains the point (4,3) and is perpendicular to the line represented by the equation y=2/5x+3?

Respuesta :

Answer:

The equation of the line  that contains the point (4,3) and is perpendicular to the line represented by the equation y=2/5x+3 will be:

  • [tex]y=-\frac{5}{2}x+13[/tex]

Step-by-step explanation:

The slope-intercept form of the line equation

y = mx+b

where

  • m is the slope
  • b is the y-intercept

Given the line

y=2/5x+3

comparing with the  slope-intercept form of the line equation

Thus, the slope of the line is: m = 2/5

We know that a line perpendicular to another line contains a slope that is the negative reciprocal of the slope of the other line, such as:  

slope = m = 2/5

Thus, the slope of the the new perpendicular line = – 1/m = [-1]/[2/5] = -5/2

Using the point-slope form of the line equation

[tex]y-y_1=m\left(x-x_1\right)[/tex]

substituting the slope of perpendicular line m = -5/2 and the point (4, 3)

[tex]y-3=-\frac{5}{2}\left(x-4\right)[/tex]

Add 3 to both sides

[tex]y-3+3=-\frac{5}{2}\left(x-4\right)+3[/tex]

[tex]y=-\frac{5}{2}x+13[/tex]

Therefore, the equation of the line  that contains the point (4,3) and is perpendicular to the line represented by the equation y=2/5x+3 will be:

  • [tex]y=-\frac{5}{2}x+13[/tex]