Ellipse center (0,0) so its eqn is x^2/a^2 + y^2/b^2 = 1 major axis is horizontal n length 18 so at y=0, x=+/-18 a=18 minor axis is vertical n length 2 so at x=0, y=+/-2 b=2
Remember , a fraction represents the parts of a unit. It is proper when the numerator is less than the denominator; and improper when the numerator is greater than the denominator. Improper fractions can be written as a mixed number in which the integer part and the corresponding proper fraction appear.