Is the equation #x^2+y^2=4# a function?
1 Answer
Mar 25, 2017
No - there is more than one
Explanation:
Equations in the form of
graph{x^2+y^2-4=0 [-7.023, 7.024, -3.51, 3.513]}
Is this a function? That is, does there exist a single
This is often called the "vertical line test" - if you draw a vertical line for any value of