Calculus
drdh=522\frac{dr}{dh}=\frac{5}{22}
drdh=−522\frac{dr}{dh}=-\frac{5}{22}
drdh=225\frac{dr}{dh}=\frac{22}{5}
drdh=−225\frac{dr}{dh}=-\frac{22}{5}