How do you graph x squared plus y squared equals 15?

Answer 1

Well, darling, that's the equation of a circle with radius √15 centered at the origin. To graph it, just draw a nice little circle with a radius of about 3.87 units. And there you have it, a perfect circle to add some pizzazz to your math class.

Answer 2

1st rearrange the equation so that it is in the form Y = . . . . .

Then substitute in values for X (use whole numbers) and use the equation to calculate the value of Y (not Y squared).

Then plot these numbers against each other (X and Y) on your graph.

Remember that you also need to include negative values for X and when taking a square root the answer can be plus or minus (plot both), if you do enough examples you'll see a pattern forming