Please help asap PLEASE

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.)

Find the value of the cosine for angle a

#1-20 state whether the angles are alternate interior, alternate exterior, vertical, or corresponding angles.