O = Intersect(yAxis, xAxis)
a = 5.3 (slider from 0 to 15, step 0.1)
b = 3.9 (slider from 0 to 15, step 0.1)
b_1: sqrt(a^(2.0) - b^(2.0))
E: x^(2.0) / a^(2.0) + y^(2.0) / b^(2.0) = 1.0