# What is the standard equation of a hyperbola?

${x}^{2} / {a}^{2} - {y}^{2} / {b}^{2} = 1$
The foci are located on the $x$-axis also called the transverse .
${y}^{2} / {a}^{2} - {x}^{2} / {b}^{2} = 1$
The foci are located on the $y$-axis also called the transverse .