The equation should be of the form- = 1, as for general hyperbola equation, with the imposed condition a = b for its coefficients, providing the right angle between asymptotes. This coefficient "a" is the distance from the center (from the sun) to the vertex of the hyperbola, which is given a = 6 x 10^9 miles. So, the equation is - = , or, which is the same - = . ANSWER