Identify and explain the types of variance analysis tools, used in a company, which specialises in spare parts for cars.

There is a line with slope 1/a going through the point (a, a²). find the equation of the line perpendicular to this line at this point. (don’t let this problem intimidate you! solve the problem as you would if i’d given you specific values. just use variables instead.)

What is the distance between the points 4,10 and -3,-14 on the coordinate plane

How do i do this activity, is appreciated