Question 184942
1. The lines are perpendicular, because the slope of two perpendicular lines is the negative reciprocal. 

2. Slope intercept form is y=mx + b, so you need to solve for y. Therefore,
y=x - 1

3. To find the equation of a line using one set of points and the slope, use the following formula: y-y^1=m(x-x^1) 
With this problem, that equation would become:
y - 6= 1/2(x - 4) which would become:
y - 6= 1/2x - 2 and then
y = 1/2x + 4

Hope this helps! Good luck! Sandy :-)