Given the graph of a line y=−x.
b
Write an equation of a line which is perpendicular and goes through the point (8,2).

Respuesta :

Answer: [tex]y=x-6[/tex]

Step-by-step explanation:

The equation of the line in Slope-Intercept form is:

[tex]y=mx+b[/tex]

Where "m" is the slope and "b" is the y-intercept.

By definition, the slopes of perpendicular lines are negative reciprocals.

Given the line:

[tex]y=-x[/tex]

We know that a line perpendicular to this line must have this slope:

[tex]m=\frac{1}{1}=1[/tex]

Since that line goes through the point (8,2), we can substitute the slope 1 and these coordinates into [tex]y=mx+b[/tex] and solve for "b":

[tex]2=(1)(8)+b\\\\2-8=b\\\\b=-6[/tex]

Therefore, the equation of this line is:

[tex]y=x-6[/tex]