How do you use algebraic reasoning to find a way to graph X2 plus Y2 equals 9 using a graphing calculator Explain why it doesn't look like a circle and also try and how you could alter the scr?

Answer 1

When graphing, you typically want an equation in the form y = f(x). To convert your equation for a circle to this form:

Y2 + X2 = 9

Y2 = 9-X2

Y=sqrt(9-X2)

This equation will not look like a circle when it is graphed because the square root of any real number is always positive, so only the positive half of the circle will be graphed.