Im going to give 20 points for this question answer it

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.)

Abank gives 6.5% interest per year. what is the growth factor b in this situation?

Anyone know? will mark brainliest if correct