Please answer the question with proper steps

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.)

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15