Which of the following details are not necessary when booking a flight

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.)

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Asphere has a diameter of 10 in. what is the volume of the sphere?