a. ellipses. b. $x^2+4y^2=4$
Work Step by Step
a. From the given pattern, we can see that it resembles ellipses. b. There is only one equation for an ellipse from this list -- that is, $x^2+4y^2=4$
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.