Question 702086
What would the slope be of a line perpendicular to y=x-3?

The two slopes are negative reciprocals of each other.  THAT slope then is -1.


You now have a point, (4, 6) and a slope, m=-1.  You could use point-slope form for equation of  a line and find the line or you could use formula for slope.  I'll choose formula for slope.


{{{{m=(y_2-x_1)/(x_2-x_1)}}}
If point #1 is allowed to be (4, 6), then
{{{-1=(y-6)/(x-4)}}}
You finish from here yourself?

(seems that formatting is not working, trying to give subscripted variables)(still learning this)