Can someone answer. there is a picture. there is only one problem. you so !

It's an ellipse centered at the origin: ezpz

take an x²
look at one of the x-intercepts
square that and slap it under the x²

put a "+" after it.

take a y²
look at one of the y-intercepts
square that and slap it under the y²
Put that all after the "+"
  
Last, put an "= 1" at the end and BAM!!!

Congratulations! You now have an equation!