Algebra 2/ 20 points + brainliest to *correct* answer!

a satellite dish is being designed so that it can pick up radio waves coming from space. the satellite dish will be in the shape of a parabola and will be positioned above the ground such that its focus is 40 ft above the ground. using the ground as the x-axis, where should the base of the satellite be positioned? which equation best describes the equation of the satellite?

(0, 20); y = 1/80 times x squared + 20
(0, 10); y = 1/120 times x squared + 10
(0, 20); y = 1/80 times x squared − 20
(0, 10); y = 1/120 times x squared − 10